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Search: id:A156914
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| A156914 |
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Triangle sequence of the central q-binomial as an antidiagonal: t(n,m)=q-binomial(2*n,n,m+1). |
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+0 1
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| 1, 1, 2, 1, 3, 6, 1, 4, 35, 20, 1, 5, 130, 1395, 70, 1, 6, 357, 33880, 200787, 252, 1, 7, 806, 376805, 75913222, 109221651, 924, 1, 8, 1591, 2558556, 6221613541, 1506472167928, 230674393235, 3432, 1, 9, 2850, 12485095, 200525284806
(list; table; graph; listen)
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OFFSET
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0,3
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COMMENT
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Row sums are:
{1, 3, 10, 60, 1601, 235283, 185513416, 1743370738292, 271152216368521131,
433949978891501890005203, 6589541880665684362990682314774,...}
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FORMULA
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t(n,m)=q-binomial(2*n,n,m+1);
out(n,m)=anti-diagonal(t(n,m)).
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EXAMPLE
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{1},
{1, 2},
{1, 3, 6},
{1, 4, 35, 20},
{1, 5, 130, 1395, 70},
{1, 6, 357, 33880, 200787, 252},
{1, 7, 806, 376805, 75913222, 109221651, 924},
{1, 8, 1591, 2558556, 6221613541, 1506472167928, 230674393235, 3432},
{1, 9, 2850, 12485095, 200525284806, 1634141006295525, 267598665689058580, 1919209135381395, 12870},
{1, 10, 4745, 48177200, 3500412775495, 391901483074853556, 6857430062381149327845, 427028776969176679964080, 63379954960524853651, 48620},
{1, 11, 7462, 156087945, 39709010932102, 35285166561510069127, 19138263752352528498478556, 460250514083576206796548772325, 6129263888495201102915629695046, 8339787869494479328087443, 184756}
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MATHEMATICA
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Clear[t, n, m, i, k, c, d, b];
t[n_, m_] = If[m == 0, n!, Product[Sum[(m + 1)^i, {i, 0, k - 1}], {k, 1, n}]];
b[n_, k_, m_] = If[n == 0, 1, t[n, m]/(t[k, m]*t[n - k, m])];
c = Table[Table[b[2*n, n, m], {n, 0, 10}], {m, 0, 10}];
d = Table[Table[c[[m, n - m + 1]], {m, n, 1, -1}], {n, 1, Length[c]}];
Flatten[d]
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CROSSREFS
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A000984, A022166, A022167, A022168, A022169, A022170, A022171, A022175
Sequence in context: A103371 A120257 A059298 this_sequence A059434 A141476 A145888
Adjacent sequences: A156911 A156912 A156913 this_sequence A156915 A156916 A156917
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KEYWORD
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nonn,tabl,uned
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Feb 18 2009
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