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A153924
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 3 ones in any 4 X 4 X 4 subtriangle.
0
1, 2, 50178, 330289, 4142724, 38758787, 721406196, 10013654728, 271477291887, 5511387919570, 217444939703686, 6427549653424203, 370935313492909781
OFFSET
0,2
CROSSREFS
Sequence in context: A290047 A094213 A321382 * A059764 A285694 A306907
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2009
STATUS
approved