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A153553 Number of planar n X n X n binary triangular grids with no more than 4 ones in any similarly oriented 3 X 3 X 3 subtriangle. 0
1, 2, 8, 57, 781, 20279, 989864, 91377864, 15933677137, 5246093512391, 3262374894683471, 3831614279502257675, 8499107956072261758908, 35605260751502551680547117, 281710507240517708494081629167 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

CROSSREFS

Sequence in context: A027335 A133686 A153525 * A191481 A229529 A007347

Adjacent sequences:  A153550 A153551 A153552 * A153554 A153555 A153556

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 01 2009

STATUS

approved

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Last modified June 17 18:57 EDT 2019. Contains 324198 sequences. (Running on oeis4.)