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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
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..30.
CROSSREFS
Sequence in context:
A193749
A049824
A133087
*
A185286
A153905
A327812
Adjacent sequences:
A153916
A153917
A153918
*
A153920
A153921
A153922
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Jan 03 2009
STATUS
approved
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Last modified July 15 03:33 EDT 2024. Contains 374324 sequences. (Running on oeis4.)