A088990 Triangle related to generalized Euler numbers of type 2^n (A005799).

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

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 * A351129 A214097 A357468

Adjacent sequences: A088987 A088988 A088989 * A088991 A088992 A088993

Keyword

easy,nonn,tabl

Author

Philippe Deléham, Nov 01 2003

Status

approved