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Search: id:A153932
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A153932 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 4 ones in any 4 X 4 X 4 subtriangle. +0
1
1, 2, 2, 3, 8, 13, 39, 225, 564, 2858, 24012, 101231, 758165, 10608857, 69903886, 854166606, 19155776749, 207379552763, 4126912621572 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A091681 A076541 A159789 this_sequence A158763 A001131 A019177

Adjacent sequences: A153929 A153930 A153931 this_sequence A153933 A153934 A153935

KEYWORD

nonn

AUTHOR

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

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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