A153538 Number of planar n X n X n binary triangular grids with no more than 4 ones in any 5 X 5 X 5 subtriangle.

1, 2, 8, 57, 386, 1941, 27034, 643985, 22001658, 944060136, 51294296160, 4601871901192

Offset

0,2

Links

Table of n, a(n) for n=0..11.

Crossrefs

Sequence in context: A113725 A345677 A256724 * A153566 A153529 A153558

Adjacent sequences: A153535 A153536 A153537 * A153539 A153540 A153541

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved