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A088990
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Triangle related to generalized Euler numbers of type 2^n (A005799).
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1
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1, 0, 1, 0, 1, 1, 0, 1, 8, 1, 0, 1, 51, 51, 1, 0, 1, 310, 1194, 310, 1, 0, 1, 1865, 21790, 21790, 1865, 1, 0, 1, 11196, 357975, 975656, 357975, 11196, 1, 0, 1, 67183, 5603421, 35471987, 35471987, 5603421, 67183, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,9
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COMMENTS
| T(n+1,n) = T(n+1,2) = Sum(0<=k<=n, (n-k)*6^k ).
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FORMULA
| Triangle T(n, k), read by rows, given by [0, 1, 0, 6, 0, 15, 0, 28, 0, 45, 0, 66, 0, ...] DELTA [1, 0, 6, 0, 15, 0, 28, 0, 45, 0, 66, 0, ...] where DELTA is the operator defined in A084938.
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CROSSREFS
| Cf. A005799 (row sums), A084938.
Sequence in context: A076107 A076952 A094922 * A194732 A110544 A153855
Adjacent sequences: A088987 A088988 A088989 * A088991 A088992 A088993
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KEYWORD
| easy,nonn,tabl
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AUTHOR
| DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Nov 01 2003
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