A005303 Representation degeneracies for Ramond strings. (Formerly M1024)

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

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 A354580

Adjacent sequences: A005300 A005301 A005302 * A005304 A005305 A005306

Keyword

nonn,easy

Author

N. J. A. Sloane.

Status

approved