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Search: id:A007402
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| A007402 |
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No-3-in-line problem for equilateral triangle array of side n.
(Formerly M0123)
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+0
1
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| 1, 1, 2, 1, 2, 15, 1, 5, 7, 971, 20, 276
(list; graph; listen)
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OFFSET
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1,3
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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).
R. H. Buchholz, personal communication.
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CROSSREFS
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Sequence in context: A153908 A048296 A016542 this_sequence A058260 A115507 A051502
Adjacent sequences: A007399 A007400 A007401 this_sequence A007403 A007404 A007405
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein
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