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A006956 Denominator of (2n+1)(2n+2) B_{2n}, where B_n are the Bernoulli numbers. Also denominators of the asymptotic expansion of the polygamma function psi'''(z).
(Formerly M2211)
+0
3
1, 1, 1, 1, 3, 1, 1, 15, 1, 5, 21, 5, 1, 21, 1, 1, 231, 5, 1, 1365, 1, 55, 21, 1, 1, 663, 11, 5, 57, 5, 1, 15015, 1, 17, 483, 1, 11, 25935, 1, 5, 21, 935, 1, 7917, 1, 23, 19437, 5, 1, 3315, 1, 55, 21, 1, 1, 191919, 253, 2465, 21, 5, 1, 1734915, 1, 1, 17157, 17, 1 (list; graph; listen)
OFFSET

3,5

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, Tenth Printing, 1972, p. 260, (6.4.14).

LINKS

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, Tenth Printing, 1972, p. 260, (6.4.14).

CROSSREFS

Numerators are in A076549. Cf. A006955/A002427.

Sequence in context: A156869 A153090 A073483 this_sequence A072285 A144269 A144270

Adjacent sequences: A006953 A006954 A006955 this_sequence A006957 A006958 A006959

KEYWORD

nonn,frac

AUTHOR

Simon Plouffe (simon.plouffe(AT)gmail.com)

EXTENSIONS

More terms from Ralf Stephan (ralf(AT)ark.in-berlin.de), Oct 19 2002

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.


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