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A111878 a(n) = denominator(digamma(n+7/2)/2 + log(2) + euler_gamma/2)/15; a(n)=denominator(f(n+2)/15) = A111877(n+1)/5. 0
1, 7, 21, 231, 3003, 3003, 51051, 969969, 969969, 22309287, 111546435, 334639305, 9704539845, 300840735195, 300840735195, 300840735195, 11131107202215, 11131107202215, 456375395290815, 19624141997505045, 19624141997505045 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Sequence related to f(n)=1/1 + 1/3 + ... + 1/(2n+1).

LINKS

Table of n, a(n) for n=0..20.

CROSSREFS

Cf. A025547.

Sequence in context: A084711 A183938 A060146 * A133279 A192734 A220161

Adjacent sequences:  A111875 A111876 A111877 * A111879 A111880 A111881

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Aug 19 2005

STATUS

approved

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Last modified July 24 16:24 EDT 2021. Contains 346273 sequences. (Running on oeis4.)