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A063810
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Growth series for Heisenberg group.
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0
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1, 4, 12, 36, 82, 164, 294, 476, 724, 1052, 1464, 1972, 2590, 3324, 4186, 5188, 6336, 7644, 9124, 10780, 12626, 14676, 16934, 19412, 22124, 25076, 28280, 31748, 35486, 39508, 43826, 48444, 53376, 58636, 64228, 70164, 76458, 83116
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| P. de la Harpe, Topics in Geometric Group Theory, Univ. Chicago Press, 2000, p. 156.
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FORMULA
| G.f.: (1+x+4*x^2+11*x^3+8*x^4+21*x^5+6*x^6+9*x^7+x^8)/((1-x)^4*(1+x+x^2)*(1+x^2)).
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CROSSREFS
| Sequence in context: A095735 A020875 A190072 * A183931 A002842 A051041
Adjacent sequences: A063807 A063808 A063809 * A063811 A063812 A063813
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Aug 20 2001
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