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Search: id:A153913
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A153913 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 3 X 3 X 3 subtriangle. +0
1
1, 2, 26, 129, 122, 239, 1864, 1591, 5085, 36162, 47771, 138927, 1581118, 1910444, 8834202, 91938135, 174908406, 743306687, 12298725970, 21309347213, 143524473375, 2166989721589, 5956644162405, 36651705702510 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A120551 A120547 A132470 this_sequence A067851 A072415 A121768

Adjacent sequences: A153910 A153911 A153912 this_sequence A153914 A153915 A153916

KEYWORD

nonn

AUTHOR

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

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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