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A123353
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Triangle read by rows, giving numbers of benzenoids (see the Cyvin-Gutman book for details).
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0
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1, 1, 1, 1, 2, 1, 1, 3, 6, 1, 1, 4, 20, 19, 1, 1, 5, 50, 155, 62, 1, 1, 6, 105, 805, 1315, 207, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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REFERENCES
| S. J. Cyvin and I. Gutman, Kekule structures in benzenoid hydrocarbons, Lecture Notes in Chemistry, No. 46, Springer, New York, 1988 (see p. 188).
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EXAMPLE
| Triangle begins:
1
1 1
1 2 1
1 3 6 1
1 4 20 19 1
1 5 50 155 62 1
1 6 105 805 1315 207 1
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CROSSREFS
| Diagonals give A026012, A123355, A123356.
Sequence in context: A107702 A174480 A111670 * A156540 A156582 A156953
Adjacent sequences: A123350 A123351 A123352 * A123354 A123355 A123356
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KEYWORD
| nonn,tabl,more
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Oct 14 2006
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