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Search: id:A094344
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| A094344 |
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Triangle T(n,k), 0<= k <= n, read by rows; given by [0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, ...] DELTA [1, 0, 2, 1, 3, 2, 4, 3, 5, 4, 6, 5, ...] where DELTA is the operator defined in A084938. |
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+0
3
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| 1, 0, 1, 0, 1, 1, 0, 2, 4, 1, 0, 6, 18, 13, 1, 0, 24, 96, 119, 46, 1, 0, 120, 600, 1059, 777, 199, 1, 0, 720, 4320, 9890, 10760, 5536, 1072, 1, 0, 5040, 35280, 99158, 142990, 111316, 44228, 6985, 1, 0, 40320, 322560, 1073692, 1926312, 2009578, 1217352
(list; table; graph; listen)
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OFFSET
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0,8
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COMMENT
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Diagonals : A000007, A000142, A001563; A000012, A014145.
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FORMULA
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Sum_{k, 0<=k<=n}T(n,k)*3^(n-k)=A128709(n). - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Mar 27 2007
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EXAMPLE
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1; 0, 1; 0, 1, 1; 0, 2, 4, 1; 0, 6, 18, 13, 1; 0, 24, 96, 119, 46, 1; ...
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CROSSREFS
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Row sums : A094664
Adjacent sequences: A094341 A094342 A094343 this_sequence A094345 A094346 A094347
Sequence in context: A070678 A124091 A067849 this_sequence A137391 A059817 A099803
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KEYWORD
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nonn,tabl
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AUTHOR
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DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Jun 02 2004
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