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A121268 Generating function = sum over all subsets S of the integers {0,1,2...} of 1/sum(1/x^n for n in S) 0
1, 2, 3, 7, 11, 25, 44, 94, 176, 367, 703, 1447, 2820, 5740, 11307, 22858, 45280, 91195, 181364, 364176, 725941, 1455473, 2905063, 5818958, 11623598, 23268350, 46503053, 93057123, 186032424, 372189177, 744179880, 1488662935, 2976845896 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

J. M. Luck and Anita Mehta, The European Journal of Physics B 57 (2007) 429, Appendi

LINKS

Table of n, a(n) for n=0..32.

EXAMPLE

Generating function = 1+2x+3x^2+7x^3+...

CROSSREFS

Sequence in context: A191659 A007481 A238312 * A101173 A294451 A005246

Adjacent sequences:  A121265 A121266 A121267 * A121269 A121270 A121271

KEYWORD

nonn

AUTHOR

Jean-Marc Luck (luck(AT)dsm-mail.saclay.cea.fr), Aug 23 2006

STATUS

approved

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Last modified April 15 01:24 EDT 2021. Contains 342974 sequences. (Running on oeis4.)