A256551 Triangle read by rows, T(n,k) matrix inverse of A256550, for n>=0 and 0<=k<=n.

1, 0, 1, 0, -1, 1, 0, 1, -3, 1, 0, 1, 6, -6, 1, 0, -15, 10, 20, -10, 1, 0, 48, -225, 50, 50, -15, 1, 0, 581, 1008, -1575, 175, 105, -21, 1, 0, -11069, 16268, 9408, -7350, 490, 196, -28, 1, 0, 20784, -398484, 195216, 56448, -26460, 1176, 336, -36, 1

Offset

0,9

Links

Table of n, a(n) for n=0..54.

Formula

T(n+1,n) = -A000217(n).

T(n+2,n) = A002415(n+1).

For T(n,1) compare A006542.

Example

Triangle starts:
[1]
[0,   1]
[0,  -1,    1]
[0,   1,   -3,     1]
[0,   1,    6,    -6,   1]
[0, -15,   10,    20, -10,   1]
[0,  48, -225,    50,  50, -15,   1]
[0, 581, 1008, -1575, 175, 105, -21, 1]

Crossrefs

Cf. A000217, A002415, A006542, A256550.

Sequence in context: A131198 A090181 A368504 * A144417 A085791 A144645

Adjacent sequences: A256548 A256549 A256550 * A256552 A256553 A256554

Keyword

sign,tabl,easy

Author

Peter Luschny, Apr 01 2015

Status

approved