A153554 Number of planar n X n X n binary triangular grids with no more than 5 ones in any similarly oriented 3 X 3 X 3 subtriangle.

1, 2, 8, 63, 981, 30204, 1838258, 221168494, 52603569364, 24733230863897, 22989019296091325, 42240982234024058721, 153433971895782184082591, 1101749861754584729817380799, 15639340662707098047927162649965

Offset

0,2

Links

Table of n, a(n) for n=0..14.

Crossrefs

Sequence in context: A098000 A084279 A153526 * A139018 A110708 A295232

Adjacent sequences: A153551 A153552 A153553 * A153555 A153556 A153557

Keyword

nonn

Author

R. H. Hardin, Jan 01 2009

Status

approved