A124553 Row 3 of table A124550; also equals the self-convolution cube of A124563, which is row 3 of table A124560.

1, 3, 15, 91, 666, 5955, 65794, 901881, 15346419, 324465907, 8535776700, 279761994750, 11438401220798, 584130591952902, 37300812251856828, 2981666324471342976, 298639111371493692105, 37510558656296021069859

Offset

0,2

Comments

In table A124550, the g.f. of row n, R_n(y), simultaneously satisfies: R_n(y) = [ Sum_{k>=0} y^k * R_{n*k}(y) ]^n for n>=0.

Links

Table of n, a(n) for n=0..17.

Formula

G.f.: A(x) = [ Sum_{k>=0} y^k * R_{3k}(y) ]^3, where R_n(x) is the g.f. of row n in table A124550.

Crossrefs

Cf. A124550; other rows: A124551, A124552, A124554, A124555, A124556.

Sequence in context: A369161 A159928 A020018 * A369623 A366053 A369114

Adjacent sequences: A124550 A124551 A124552 * A124554 A124555 A124556

Keyword

nonn

Author

Paul D. Hanna, Nov 07 2006

Status

approved