A124558 Secondary diagonal of table A124550; a(n) = A124550(n+1,n).

1, 2, 15, 204, 4345, 133212, 5621371, 319211576, 24097683942, 2399637270890, 313606810455697, 53638534570897308, 11984755429488415041, 3491974842611221434342, 1324861497596788043284935

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..14.

Formula

a(n) is divisible by (n+1): A124559(n) = a(n)/(n+1).

Crossrefs

Cf. A124550 (table); A124557, A124559; A124551, A124552, A124554, A124555, A124556.

Sequence in context: A323118 A184361 A351501 * A020565 A377861 A282521

Adjacent sequences: A124555 A124556 A124557 * A124559 A124560 A124561

Keyword

nonn

Author

Paul D. Hanna, Nov 07 2006

Status

approved