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Search: id:A153958
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A153958 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 7 ones in any 5 X 5 X 5 subtriangle. +0
1
1, 2, 2, 4, 6, 8, 14, 52, 78, 248, 909, 2324, 7268, 47501, 121021, 658137, 4239215, 19354790, 106079779, 1177208160, 5469153552, 52045617401, 594802267838, 4804258306801, 46214470259731, 931757866564437, 7539129948721736 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A123862 A089647 A145465 this_sequence A153964 A001010 A091966

Adjacent sequences: A153955 A153956 A153957 this_sequence A153959 A153960 A153961

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 03 2009

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Last modified March 11 00:12 EST 2010. Contains 173097 sequences.

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