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A098283
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Consider the family of multigraphs enriched by the species of cycles. Sequence gives the triangle read by rows giving coefficients of polynomials arising from enumeration of those multigraphs on n edges.
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1, 1, 1, 1, 1, 2, 4, 7, 3, 1, 6, 17, 50, 47, 25, 6, 1, 24, 85, 370, 617, 526, 235, 65, 10, 1, 120, 499, 2929, 7700, 10205, 7173, 3026, 800, 140, 15, 1, 720, 3388, 25165, 95907, 189224, 197893, 121521, 47145, 12236, 2170, 266, 21, 1, 5040, 26200
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,6
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REFERENCES
| G. Paquin, D'enombrement de multigraphes enrichis, M'emoire, Math. Dept., Univ. Qu'ebec `a Montr'eal, 2004.
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EXAMPLE
| 1, x^2, x^2+x^3+x^4, 2x^2+4x^3+7x^4+3x^5+x^6, 6x^2+17x^3+50x^4+47x^5+25x^6+6x^7+x^8, ...
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CROSSREFS
| Sequence in context: A133292 A126218 A086330 * A137282 A139696 A084332
Adjacent sequences: A098280 A098281 A098282 * A098284 A098285 A098286
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KEYWORD
| nonn,tabf
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Oct 26 2004
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