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Number of planar n X n X n binary triangular grids with every one adjacent to exactly 1 other one.
0

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

%S 1,1,4,10,45,327,2795,37386,708255,18674478,714577926,38756649867,

%T 2991760323799,329930606705391,51795338953514297,11590318613952416039,

%U 3697221054959107433421,1680594967102679237735428

%N Number of planar n X n X n binary triangular grids with every one adjacent to exactly 1 other one.

%K nonn

%O 0,3

%A _R. H. Hardin_ Jan 04 2009