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A153985
Number of planar n X n X n binary triangular grids with every one adjacent to exactly 1 other one.
0
1, 1, 4, 10, 45, 327, 2795, 37386, 708255, 18674478, 714577926, 38756649867, 2991760323799, 329930606705391, 51795338953514297, 11590318613952416039, 3697221054959107433421, 1680594967102679237735428
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..17.
CROSSREFS
Sequence in context:
A155237
A155223
A155219
*
A184481
A149227
A149228
Adjacent sequences:
A153982
A153983
A153984
*
A153986
A153987
A153988
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Jan 04 2009
STATUS
approved
