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A153900
Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 1 one in any 3 X 3 X 3 subtriangle.
0
1, 2, 2, 3, 5, 10, 18, 48, 97, 299, 769, 2879, 9061, 41454, 154622, 857522, 3902066, 26137942, 144826739, 1177942368, 7878440446, 77715100928, 630332738835, 7530329483705, 74116147914872, 1073536700395590, 12799994974031763
OFFSET
0,2
CROSSREFS
Sequence in context: A360299 A344708 A322113 * A049873 A127180 A317809
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 03 2009
STATUS
approved