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A124554 Row 4 of table A124550; also equals the self-convolution 4th power of A124564, which is row 4 of table A124560. 10
1, 4, 26, 204, 1899, 21180, 287568, 4802716, 99084889, 2531896840, 80346294380, 3173108251044, 156222183969181, 9603287701405136, 738066706464107408, 71003673625149131020, 8559188942710590217013, 1294012524894298022238700 (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_{4k}(y) ]^4, where R_n(x) is the g.f. of row n in table A124550.

CROSSREFS

Cf. A124550; other rows: A124551, A124552, A124553, A124555, A124556.

Sequence in context: A253255 A141381 A118971 * A321586 A206391 A228966

Adjacent sequences:  A124551 A124552 A124553 * A124555 A124556 A124557

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Nov 07 2006

STATUS

approved

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Last modified March 26 14:51 EDT 2019. Contains 321497 sequences. (Running on oeis4.)