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A005303 Representation degeneracies for Ramond strings.
(Formerly M1024)
0
1, 0, 2, 4, 6, 12, 22, 36, 62, 104, 166, 268, 426, 660, 1022, 1564, 2358, 3540, 5266, 7756, 11362, 16524, 23854, 34252, 48890, 69368, 97942, 137588, 192314, 267628, 370798, 511524, 702886 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

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

LINKS

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

T. L. Curtright and C. B. Thorn, Symmetry patterns in the mass spectra of dual string models, Nuclear Phys. B 274 (1986), 520-588.

FORMULA

G.f.: Product (1 - x^k)^(-c(k)), c(k) = 0, 2, 4, 3, 4, 2, 4, 2, 4, 2, ....

CROSSREFS

Sequence in context: A321739 A073660 A102588 * A292320 A057575 A196700

Adjacent sequences:  A005300 A005301 A005302 * A005304 A005305 A005306

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified June 20 12:04 EDT 2021. Contains 345164 sequences. (Running on oeis4.)