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Search: id:A153934
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A153934 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 4 ones in any 4 X 4 X 4 subtriangle. +0
1
1, 2, 2, 3, 4, 7, 9, 37, 44, 122, 360, 837, 1955, 11063, 21562, 102402, 455597, 1800255, 6701316, 61868659, 193623470, 1467251281, 10855933316, 68253791333, 417351118269, 6197640479557, 31389717866283, 387573069042758 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A083129 A110160 A003179 this_sequence A143590 A059348 A110871

Adjacent sequences: A153931 A153932 A153933 this_sequence A153935 A153936 A153937

KEYWORD

nonn

AUTHOR

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

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Last modified December 20 13:54 EST 2009. Contains 171081 sequences.

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