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Search: id:A123353
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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
1
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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; listen)
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OFFSET
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0,5
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REFERENCES
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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
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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
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Diagonals give A026012, A123355, A123356.
Sequence in context: A144303 A107702 A111670 this_sequence A156540 A156582 A156953
Adjacent sequences: A123350 A123351 A123352 this_sequence A123354 A123355 A123356
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KEYWORD
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nonn,tabl,more
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Oct 14 2006
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