A153995 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 11 ones in any 5 X 5 X 5 subtriangle.

1, 2, 4, 16, 64, 480, 3736, 56603, 866980, 25953214, 787663876, 46715890643, 2808165369921, 329814202089783, 39245990906253437, 9118402420254407206, 2146932074632111803427

Offset

0,2

Links

Table of n, a(n) for n=0..16.

Crossrefs

Sequence in context: A280132 A138870 A153992 * A153998 A154001 A154004

Adjacent sequences: A153992 A153993 A153994 * A153996 A153997 A153998

Keyword

nonn

Author

R. H. Hardin Jan 04 2009

Status

approved