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.

1, 2, 4, 16, 64, 511, 4087, 65266, 1043960, 33294340, 1064788451, 67924859273, 4344369237533, 554246140585577, 70893824733656698, 18088030701247974490, 4627052123343980555078, 2360992279682367231113937

Offset

0,2

Links

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

Crossrefs

Sequence in context: A153995 A153998 A154001 * A338364 A060656 A271234

Adjacent sequences: A154001 A154002 A154003 * A154005 A154006 A154007

Keyword

nonn

Author

R. H. Hardin Jan 04 2009

Status

approved