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A130409 Denominators of a-sequence for Sheffer matrix A130191 (Stirling2 squared). +0
2
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 (list; graph; listen)
OFFSET

0,3

COMMENT

The numerators are found in A130408.

See the W. Lang link in A130408.

FORMULA

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

CROSSREFS

Sequence in context: A081714 A117718 A086826 this_sequence A071167 A076365 A070971

Adjacent sequences: A130406 A130407 A130408 this_sequence A130410 A130411 A130412

KEYWORD

nonn,frac,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Jun 01 2007

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.


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