A130409 Denominators of a-sequence for Sheffer matrix A130191 (Stirling2 squared).

1, 1, 3, 4, 15, 3, 84, 3, 5, 20, 33, 6, 5460, 210, 12, 48, 255, 45, 1596, 105, 2310, 1320, 138, 36, 9100, 546, 756, 112, 435, 30, 114576, 42, 58905, 140, 105, 18, 767676, 3458, 16380, 1680, 15785, 385, 132440, 990, 434700, 38640, 3948, 360, 3248700, 99450

Offset

0,3

Comments

The numerators are found in A130408.

See the W. Lang link in A130408.

Links

Table of n, a(n) for n=0..49.

Formula

a(n)=denominator(r(n)),n>=0, with the rational r(n) sequence with e.g.f. x/log(1+log(1+x)).

Crossrefs

Sequence in context: A286081 A286769 A286115 * A365349 A258468 A327275

Adjacent sequences: A130406 A130407 A130408 * A130410 A130411 A130412

Keyword

nonn,frac,easy

Author

Wolfdieter Lang Jun 01 2007

Status

approved