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Row 2 of table A124550; also equals the self-convolution square of A124562, which is row 2 of table A124560.
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%I #3 Mar 30 2012 18:37:01

%S 1,2,7,30,159,1056,8812,92062,1200415,19512990,395379699,9991017068,

%T 315094522052,12413464676162,611490149713956,37699912801819870,

%U 2911578809929672737,281916836769424155940,34249052273023310929439

%N Row 2 of table A124550; also equals the self-convolution square of A124562, which is row 2 of table A124560.

%C 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.

%F G.f.: A(x) = [ Sum_{k>=0} y^k * R_{2k}(y) ]^2, where R_n(x) is the g.f. of row n in table A124550.

%Y Cf. A124550; other rows: A124551, A124553, A124554, A124555, A124556.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Nov 07 2006