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Search: id:A005963
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| A005963 |
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Number of restricted hexagonal polyominoes with n cells.
(Formerly M1969)
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+0
6
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| 0, 0, 1, 2, 10, 45, 210, 1002, 4883, 23797, 116518, 571471
(list; graph; listen)
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OFFSET
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1,4
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
A. T. Balaban, Enumeration of Cyclic Graphs, pp. 63-105 of A. T. Balaban, ed., Chemical Applications of Graph Theory, Ac. Press, 1976; see p. 75.
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CROSSREFS
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Equals A000228 - A002216.
Cf. A036359, A002216, A005963, A000228, A001998.
Sequence in context: A145239 A068561 A068484 this_sequence A140588 A137334 A080643
Adjacent sequences: A005960 A005961 A005962 this_sequence A005964 A005965 A005966
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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