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A153907
Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 1 one in any 5 X 5 X 5 subtriangle.
0
1, 2, 1, 1, 2, 1, 2, 3, 2, 3, 5, 5, 4, 10, 7, 10, 18, 18, 20, 54, 43, 69, 145, 149, 219, 551, 486, 835, 1828, 2107, 2978
OFFSET
0,2
CROSSREFS
Sequence in context: A161067 A161106 A161041 * A029306 A337511 A261363
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2009
STATUS
approved