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A153950 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 6 ones in any 5 X 5 X 5 subtriangle. 0
1, 2, 2, 4, 11, 16, 47, 268, 865, 4671, 46197, 216961, 1952323, 31953148, 252461942, 3687648150, 101320234793 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
CROSSREFS
Sequence in context: A280531 A072074 A052338 * A153947 A298778 A260878
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2009
STATUS
approved

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Last modified February 21 18:07 EST 2024. Contains 370237 sequences. (Running on oeis4.)