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A153960 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 8 ones in any 4 X 4 X 4 subtriangle. 0
1, 2, 4, 16, 61, 481, 3632, 56460, 846246, 26077855, 775360108, 47367748738, 2788988175862, 337520120950504, 39370755765040186, 9439231435010737547, 2181450759732224994542, 1036179888983780783839829 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
CROSSREFS
Sequence in context: A228626 A152876 A153963 * A339648 A005027 A153969
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 03 2009
STATUS
approved

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Last modified May 22 19:48 EDT 2024. Contains 372758 sequences. (Running on oeis4.)