A153535 Number of planar n X n X n binary triangular grids with no more than 1 one in any 5 X 5 X 5 subtriangle.

1, 2, 4, 7, 11, 16, 38, 113, 342, 975, 2636, 8729, 35249, 159811, 757035, 3630603, 19165047, 115453377, 782498885, 5793617152, 45722686214, 390614558026, 3684092364605, 38520543111851, 443271652337403, 5554115003205511

Offset

0,2

Links

Table of n, a(n) for n=0..25.

Crossrefs

Sequence in context: A108895 A146929 A146921 * A116615 A053145 A192589

Adjacent sequences: A153532 A153533 A153534 * A153536 A153537 A153538

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved