A200172 Column 3 of triangle A200171.

1, 11, -54, 302, -1483, 7009, -32030, 143210, -629848, 2735812, -11767534, 50220042, -212952283, 898198877, -3771484798, 15775723922, -65770848988, 273420862112, -1133802617998, 4691140763402, -19371432850768, 79850555673176, -328627887379774, 1350540667070002, -5543004766417298

Offset

1,2

Links

Table of n, a(n) for n=1..25.

Prog

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

Crossrefs

Cf. A200171, A200173, A200140.

Sequence in context: A309921 A061983 A079884 * A348025 A050900 A246406

Adjacent sequences: A200169 A200170 A200171 * A200173 A200174 A200175

Keyword

sign

Author

Paul D. Hanna, Nov 13 2011

Status

approved