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Search: id:A070765
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| A070765 |
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Number of polyiamonds with n cells, without holes. |
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+0
6
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| 1, 1, 1, 3, 4, 12, 24, 66, 159, 444, 1161, 3226, 8785, 24453, 67716, 189309, 528922, 1484738, 4172185, 11756354, 33174451, 93795220, 265565628, 753060469, 2138206966, 6078931114, 17302380313, 49302121747
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OFFSET
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1,4
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REFERENCES
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E. V. Konstantinova and M. V. Vidyuk, Discriminating tests of information and toplogical indices; animals and trees; J. Chem. Inf. Comput. Sci., 43 (2003), 1860-1871.
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CROSSREFS
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Equals A000577(n)-A070764(n). Cf. A000104, A018190.
Sequence in context: A081621 A073713 A084921 this_sequence A000577 A111758 A000942
Adjacent sequences: A070762 A070763 A070764 this_sequence A070766 A070767 A070768
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KEYWORD
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hard,nonn
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AUTHOR
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Joseph Myers (jsm(AT)polyomino.org.uk), May 05 2002
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EXTENSIONS
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More terms from Joseph Myers (jsm(AT)polyomino.org.uk), Nov 11 2003
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