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A088990 Triangle related to generalized Euler numbers of type 2^n (A005799). 1
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; text; internal format)
OFFSET

0,9

COMMENTS

T(n+1,n) = T(n+1,2) = Sum(0<=k<=n, (n-k)*6^k ).

LINKS

Table of n, a(n) for n=0..44.

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.

CROSSREFS

Cf. A005799 (row sums), A084938.

Sequence in context: A342980 A094922 A230049 * A214097 A194732 A217739

Adjacent sequences:  A088987 A088988 A088989 * A088991 A088992 A088993

KEYWORD

easy,nonn,tabl

AUTHOR

Philippe Deléham, Nov 01 2003

STATUS

approved

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Last modified October 23 10:54 EDT 2021. Contains 348211 sequences. (Running on oeis4.)