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Search: id:A153964
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A153964 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 8 ones in any 5 X 5 X 5 subtriangle. +0
1
1, 2, 2, 4, 6, 8, 17, 62, 97, 362, 1324, 3868, 13138, 92566, 270599, 1645369, 11553340, 61799175, 385381600, 4833634814, 26435310212, 299198500876, 3860046376506, 38367622605338, 439015544648715, 10375069938961300 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A089647 A145465 A153958 this_sequence A001010 A091966 A055529

Adjacent sequences: A153961 A153962 A153963 this_sequence A153965 A153966 A153967

KEYWORD

nonn

AUTHOR

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

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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