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A153996
Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 11 ones in any 5 X 5 X 5 subtriangle.
0
1, 2, 2, 4, 8, 12, 26, 101, 183, 703, 2877, 10411, 40654, 329616, 1193895, 9029186, 73784076, 520396717, 3984125165, 63450006981, 453313410587, 6773173674923, 109501240761989, 1529036617116906, 23146045371160181, 731081927354538564
(list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
Table of n, a(n) for n=0..25.
CROSSREFS
Sequence in context: A102456 A032067 A337361 * A123024 A079092 A323865
Adjacent sequences: A153993 A153994 A153995 * A153997 A153998 A153999
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2009
STATUS
approved

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Last modified November 16 16:42 EST 2024. Contains 377799 sequences.
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