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A288868 Denominators of the z-sequence for the Sheffer matrix S2*P = A048993*A007318 = A049020. 1

%I

%S 1,1,3,4,30,12,84,4,15,10,22,3,455,105,1,48,510,36,2660,168,660,1320,

%T 184,720,27300,6552,216,16,3480,240,114576,176,5355,3570,126,6,959595,

%U 10374,630,840

%N Denominators of the z-sequence for the Sheffer matrix S2*P = A048993*A007318 = A049020.

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

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

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

%Y Cf. A288867.

%K nonn,frac,easy

%O 0,3

%A _Wolfdieter Lang_, Jun 20 2017

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Last modified July 25 20:55 EDT 2021. Contains 346291 sequences. (Running on oeis4.)