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A288868 Denominators of the z-sequence for the Sheffer matrix S2*P = A048993*A007318 = A049020. 1
1, 1, 3, 4, 30, 12, 84, 4, 15, 10, 22, 3, 455, 105, 1, 48, 510, 36, 2660, 168, 660, 1320, 184, 720, 27300, 6552, 216, 16, 3480, 240, 114576, 176, 5355, 3570, 126, 6, 959595, 10374, 630, 840 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

The numerators are in A288867 where details and examples are given.

LINKS

Table of n, a(n) for n=0..39.

FORMULA

E.g.f. of r(n) = A288867(n)/a(n), n >= 0: (exp(x)-1)/(log(1+x)*exp(x)).

a(n) = denominator(r(n)) (r(n) in lowest terms).

CROSSREFS

Cf. A288867.

Sequence in context: A226049 A100600 A345022 * A076001 A225629 A032833

Adjacent sequences:  A288865 A288866 A288867 * A288869 A288870 A288871

KEYWORD

nonn,frac,easy

AUTHOR

Wolfdieter Lang, Jun 20 2017

STATUS

approved

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Last modified June 16 19:49 EDT 2021. Contains 345068 sequences. (Running on oeis4.)