A153526 - OEIS

%I #5 Apr 28 2021 00:02:33

%S 1,2,8,63,981,30024,1807250,213927268,49795084180,22791997973462,

%T 20514123247423935,36307660199677051280,126362515904909451106459,

%U 864794574138352010221407430,11638106971975324518132459725847

%N Number of planar n X n X n binary triangular grids with no more than 5 ones in any 3 X 3 X 3 subtriangle.

%K nonn

%O 0,2

%A _R. H. Hardin_, Jan 01 2009