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A123354
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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, 3, 1, 1, 6, 9, 1, 1, 10, 40, 27, 1, 1, 15, 125, 272, 81, 1, 1, 21, 315, 1625, 1856, 243, 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. 210).
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EXAMPLE
| Triangle begins:
1
1 1
1 3 1
1 6 9 1
1 10 40 27 1
1 15 125 272 81 1
1 21 315 1625 1856 243 1
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CROSSREFS
| Diagonals give A000244, A123357, A123358.
Sequence in context: A158359 A046716 A202605 * A120247 A102479 A053193
Adjacent sequences: A123351 A123352 A123353 * A123355 A123356 A123357
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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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