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