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A153556 Number of planar n X n X n binary triangular grids with no more than 2 ones in any similarly oriented 4 X 4 X 4 subtriangle. 0
1, 2, 7, 22, 56, 314, 2550, 24293, 250951, 3887949, 82407385, 2243004307, 76766225602, 3520427296494, 214433571928555, 17089012661741075, 1773800463147318841, 242243488411952546357 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..17.

CROSSREFS

Sequence in context: A153536 A153564 A153527 * A099132 A139398 A226910

Adjacent sequences:  A153553 A153554 A153555 * A153557 A153558 A153559

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 01 2009

STATUS

approved

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Last modified November 20 21:27 EST 2018. Contains 317422 sequences. (Running on oeis4.)