A200173 Column 4 of triangle A200171.

1, 16, -118, 827, -5003, 28030, -148510, 755822, -3730648, 17978182, -84987758, 395482817, -1816357723, 8250123002, -37119350398, 165645101162, -733919156188, 3231337461302, -14147884841998, 61636377252452, -267325773340624, 1154761882042826, -4969989654817598, 21319249101605002

Offset

1,2

Links

Table of n, a(n) for n=1..24.

Prog

 (PARI) {a(n)=local(A=1+x); for(i=1, (n+3)^2+n+6, A=(1+x*A)*(1+x^(n+3)/(A+x*O(x^((n+3)^2+4))))); polcoeff(A, (n+3)^2+n+6)}

Crossrefs

Cf. A200171, A200172, A200140.

Sequence in context: A101377 A302897 A145216 * A226761 A250169 A210428

Adjacent sequences: A200170 A200171 A200172 * A200174 A200175 A200176

Keyword

sign

Author

Paul D. Hanna, Nov 13 2011

Status

approved