A153912 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 2 ones in any 3 X 3 X 3 subtriangle.

1, 2, 28586, 195384, 2093119, 20428045, 317866834, 4492197059, 100898111116, 2073132268053, 67489432729042, 2005814360075163, 94662265499676795, 4075394325398277635, 278524123602639198495, 17377022786797473216927

Offset

0,2

Links

Table of n, a(n) for n=0..15.

Crossrefs

Sequence in context: A133857 A349519 A232869 * A247790 A233460 A324164

Adjacent sequences: A153909 A153910 A153911 * A153913 A153914 A153915

Keyword

nonn

Author

R. H. Hardin, Jan 03 2009

Status

approved