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A153919 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 2 ones in any 5 X 5 X 5 subtriangle. 0
1, 2, 1, 1, 2, 1, 2, 5, 4, 7, 14, 16, 20, 63, 57, 108, 299, 347, 613, 2185, 2276, 5449, 17797, 25318, 53655, 235092, 303467, 840222, 3331923, 5849149, 14333903 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
CROSSREFS
Sequence in context: A193749 A049824 A133087 * A185286 A153905 A327812
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2009
STATUS
approved

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Last modified March 28 10:31 EDT 2024. Contains 371240 sequences. (Running on oeis4.)