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A120083 Denominators of expansion for Debye function for n=1: D(1,x). +0
3
1, 4, 36, 1, 3600, 1, 211680, 1, 10886400, 1, 526901760, 1, 16999766784000, 1, 1120863744000, 1, 181400588328960000, 1, 97072790126247936000, 1, 16860010916664115200000, 1, 324325300906011525120000, 1 (list; graph; listen)
OFFSET

0,2

COMMENT

Numeratators are found under A120082.

FORMULA

a(n)=denominator(r(n)), with r(n):=[x^n](1-x/4+sum((B(2*k)/((2*k+1)*(2*k)!))*x^(2*k),0,..infinity)), |x|<2*pi. B(2*k):=A000367(k)/A002445(k) (Bernoulli numbers).

CROSSREFS

Adjacent sequences: A120080 A120081 A120082 this_sequence A120084 A120085 A120086

Sequence in context: A005026 A123745 A053426 this_sequence A110219 A092960 A027644

KEYWORD

nonn,easy,frac

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Jul 20 2006

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Last modified October 10 20:39 EDT 2008. Contains 144831 sequences.


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