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Search: id:A123354
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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
1
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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; 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. 210).
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EXAMPLE
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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
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Diagonals give A000244, A123357, A123358.
Sequence in context: A137251 A158359 A046716 this_sequence A120247 A102479 A053193
Adjacent sequences: A123351 A123352 A123353 this_sequence A123355 A123356 A123357
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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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