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Search: id:A119708
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| A119708 |
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Number of free hexagonal polygons of symmetry class D_(3h) and area n. |
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+0
1
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| 0, 0, 1, 1, 0, 1, 1, 0, 1, 4, 0, 3, 4, 0, 3, 12, 0, 6, 19, 0, 10, 41, 0, 16, 72, 0, 28, 149, 0, 50, 72, 0, 87, 557, 0
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OFFSET
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1,10
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REFERENCES
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Markus Voege, Anthony J. Guttmann and Iwan Jensen, "On the number of benzenoid hydrocarbons", J. Chem. Inf. Comput. Sci., (2002), vol. 42, 456-466.
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CROSSREFS
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Cf. A121212, A121211, A121210, A120991.
Adjacent sequences: A119705 A119706 A119707 this_sequence A119709 A119710 A119711
Sequence in context: A086165 A096303 A021252 this_sequence A106142 A092512 A060568
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KEYWORD
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nonn
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AUTHOR
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njas, Aug 27 2006
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