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A153944 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 5 ones in any 5 X 5 X 5 subtriangle. 0
1, 2, 2, 3, 8, 6, 28, 164, 366, 1829, 16995, 53701, 369189, 5605587, 28526549, 299788077, 7021649770, 53533022280 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

CROSSREFS

Sequence in context: A213329 A069830 A153935 * A046652 A319860 A300354

Adjacent sequences:  A153941 A153942 A153943 * A153945 A153946 A153947

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2009

STATUS

approved

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Last modified December 16 00:33 EST 2019. Contains 330013 sequences. (Running on oeis4.)