A076904 - OEIS

A076904

Denominator of coefficients of power series for exp(exp(x)-1).

1, 1, 1, 6, 8, 30, 720, 5040, 224, 17280, 145152, 1330560, 479001600, 6227020800, 43589145600, 261534873600, 20922789888000, 1097800704000, 914624815104000, 121645100408832000, 12412765347840000, 17030314057236480000, 22039229956423680000, 12926008369442488320000

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OFFSET

0,4

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..450

FORMULA

a(n) = A000142(n) / gcd(A000110(n),n!).

MATHEMATICA

a[n_] := Numerator[n!/BellB[n]]; Array[a, 24, 0] (* Amiram Eldar, May 03 2025 *)

CROSSREFS

Cf. A000110, A000142, A076903 (numerators).

Sequence in context: A099431 A323201 A261062 * A354205 A219681 A389859

Adjacent sequences: A076901 A076902 A076903 * A076905 A076906 A076907

KEYWORD

frac,nonn,easy

AUTHOR

Benoit Cloitre, Nov 27 2002

STATUS

approved