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A124553 Row 3 of table A124550; also equals the self-convolution cube of A124563, which is row 3 of table A124560. 7
1, 3, 15, 91, 666, 5955, 65794, 901881, 15346419, 324465907, 8535776700, 279761994750, 11438401220798, 584130591952902, 37300812251856828, 2981666324471342976, 298639111371493692105, 37510558656296021069859 (list; graph; refs; listen; history; text; internal format)
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: A006632 A159928 A020018 * A020108 A323696 A231657

Adjacent sequences:  A124550 A124551 A124552 * A124554 A124555 A124556

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 07 2006

STATUS

approved

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Last modified March 21 12:12 EDT 2019. Contains 321369 sequences. (Running on oeis4.)