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A007402 No-3-in-line problem for equilateral triangle array of side n.
(Formerly M0123) 		+0
1
1, 1, 2, 1, 2, 15, 1, 5, 7, 971, 20, 276 (list; graph; listen)
OFFSET

1,3
REFERENCES

R. H. Buchholz, personal communication.

CROSSREFS

Sequence in context: A052579 A048296 A016542 this_sequence A058260 A115507 A051502

Adjacent sequences: A007399 A007400 A007401 this_sequence A007403 A007404 A007405

KEYWORD

nonn,nice

AUTHOR

njas, Mira Bernstein

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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