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A107310
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Triangle read by rows, related to enumeration of polycyclic conjugated hydrocarbons (see Brunvoll reference for precise definition).
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0
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1, 1, 1, 1, 2, 1, 5, 11, 7, 1, 25, 60, 46, 12, 1, 125, 325, 290, 106, 17, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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REFERENCES
| J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Isomer enumeration of polygonal systems..., J. Molec. Struct. (Theochem), 364 (1996), 1-13.
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EXAMPLE
| Triangle begins:
1
1 1
1 2 1
5 11 7 1
25 60 46 12 1
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CROSSREFS
| Sequence in context: A174218 A049948 A110352 * A049950 A095216 A174317
Adjacent sequences: A107307 A107308 A107309 * A107311 A107312 A107313
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KEYWORD
| nonn,tabl
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Aug 18 2006
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