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A154004 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 14 ones in any 5 X 5 X 5 subtriangle. 0
1, 2, 4, 16, 64, 511, 4087, 65266, 1043960, 33294340, 1064788451, 67924859273, 4344369237533, 554246140585577, 70893824733656698, 18088030701247974490, 4627052123343980555078, 2360992279682367231113937 (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: A153995 A153998 A154001 * A060656 A061286 A019279

Adjacent sequences:  A154001 A154002 A154003 * A154005 A154006 A154007

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2009

STATUS

approved

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Last modified November 23 04:44 EST 2014. Contains 249839 sequences.