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Search: id:A123316
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| A123316 |
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Triangle read by rows: T(n,k)=(k+1)*n!/2 (1<=k<=n). |
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+0
1
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| 1, 2, 3, 6, 9, 12, 24, 36, 48, 60, 120, 180, 240, 300, 360, 720, 1080, 1440, 1800, 2160, 2520, 5040, 7560, 10080, 12600, 15120, 17640, 20160, 40320, 60480, 80640, 100800, 120960, 141120, 161280, 181440, 362880, 544320, 725760, 907200, 1088640
(list; table; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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Triangle begins:
{1},
{2, 3},
{6, 9, 12},
{24, 36, 48, 60},
{120, 180, 240, 300, 360},
{720, 1080, 1440, 1800, 2160, 2520},
{5040, 7560, 10080, 12600, 15120, 17640, 20160}
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MAPLE
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T:=(n, k)->(k+1)*n!/2: for n from 1 to 10 do seq(T(n, k), k=1..n) od; # yields sequence in triangular form
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MATHEMATICA
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t[n_, m_] := (m + 1)*n!/2; a = Table[Table[t[n, m], {m, 1, n}], {n, 1, 10}]; Flatten[a]
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CROSSREFS
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Cf. A051683.
Sequence in context: A008810 A144677 A058616 this_sequence A096845 A130673 A062891
Adjacent sequences: A123313 A123314 A123315 this_sequence A123317 A123318 A123319
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KEYWORD
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nonn,tabl
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Nov 09 2006
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Dec 03 2006
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