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A008796
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Molien series for 3-dimensional group [2,n ]+ = 22n; also for group H_{1,2} of order 384.
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0
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1, 0, 2, 1, 4, 2, 7, 4, 10, 7, 14, 10, 19, 14, 24, 19, 30, 24, 37, 30, 44, 37, 52, 44, 61, 52, 70, 61, 80, 70, 91, 80, 102, 91, 114, 102, 127, 114, 140, 127, 154, 140, 169, 154, 184, 169, 200, 184, 217, 200, 234, 217
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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LINKS
| E. Bannai, S. T. Dougherty, M. Harada and M. Oura, Type II Codes, Even Unimodular Lattices and Invariant Rings, IEEE Trans. Information Theory, Volume 45, Number 4, 1999, 1194-1205.
Index to sequences with linear recurrences with constant coefficients, signature (0,2,1,-1,-2,0,1).
Index entries for Molien series
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MAPLE
| (1+x^4)/((1-x^2)^2*(1-x^3)).
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CROSSREFS
| Sequence in context: A205685 A143375 A074364 * A079966 A101707 A113418
Adjacent sequences: A008793 A008794 A008795 * A008797 A008798 A008799
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KEYWORD
| nonn,nice,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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