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A153945 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 5 X 5 X 5 subtriangle. 0
1, 2, 4, 15, 38, 116, 499, 3634, 26242, 291832, 2965112, 51213790, 844607038, 23147940890, 598064925200, 25057845860011, 1027607776126888 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..16.

CROSSREFS

Sequence in context: A181442 A007122 A005219 * A153942 A055466 A342957

Adjacent sequences:  A153942 A153943 A153944 * A153946 A153947 A153948

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2009

STATUS

approved

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Last modified June 21 06:55 EDT 2021. Contains 345358 sequences. (Running on oeis4.)