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A153964 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 8 ones in any 5 X 5 X 5 subtriangle. 0

%I #3 Mar 31 2012 12:35:21

%S 1,2,2,4,6,8,17,62,97,362,1324,3868,13138,92566,270599,1645369,

%T 11553340,61799175,385381600,4833634814,26435310212,299198500876,

%U 3860046376506,38367622605338,439015544648715,10375069938961300

%N Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 8 ones in any 5 X 5 X 5 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_ Jan 03 2009

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Last modified June 24 19:44 EDT 2024. Contains 373690 sequences. (Running on oeis4.)