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Search: id:A153916
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A153916 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 2 ones in any 4 X 4 X 4 subtriangle. +0
1
1, 2, 1, 1, 2, 2, 3, 6, 7, 14, 21, 38, 56, 157, 218, 502, 1201, 2460, 4784, 17658, 30630, 97836, 276873, 784468, 1952042, 9254403, 20443559, 84386183, 315136918, 1139402048, 3692342904 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A119985 A116560 A103784 this_sequence A045870 A036863 A083698

Adjacent sequences: A153913 A153914 A153915 this_sequence A153917 A153918 A153919

KEYWORD

nonn

AUTHOR

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

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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