A126345 Main diagonal of triangle A126343.

1, 2, 12, 152, 2430, 45222, 991571, 26447976, 820357488, 28305482450, 1085325479073, 46235590117092, 2158387195914560, 109266107109056562, 5971923549022596600

Offset

1,2

Links

Table of n, a(n) for n=1..15.

Example

a(n) appears to be divisible by n:
a(n)/n = [1,1,4,38,486,7537,141653,3305997,91150832,2830548245,...].

Crossrefs

Cf. A126343.

Sequence in context: A279011 A279183 A126777 * A229558 A362694 A208582

Adjacent sequences: A126342 A126343 A126344 * A126346 A126347 A126348

Keyword

more,nonn

Author

Paul D. Hanna, Dec 25 2006

Extensions

More terms from Paul D. Hanna, Jan 03 2007

Status

approved