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Search: id:A006761
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| A006761 |
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Number of one-sided 5-dimensional polyominoes with n cells.
(Formerly M4460)
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+0
1
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OFFSET
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1,6
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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).
W. F. Lunnon, Counting multidimensional polyominoes. Computer Journal 18 (1975), no. 4, pp. 366-367.
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MATHEMATICA
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a[1] := 2; a[n_] := FromDigits@Flatten@Transpose[{ Length /@ Split@IntegerDigits@a[n - 1], First /@ Split@IntegerDigits@a[n - 1]}] Table[a[x], {x, 10}] [From Nicholas Georgakopoulos (ngeorgak(AT)iupui.edu), Nov 19 2008]
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CROSSREFS
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Sequence in context: A070248 A159659 A100868 this_sequence A144683 A141835 A111831
Adjacent sequences: A006758 A006759 A006760 this_sequence A006762 A006763 A006764
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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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