OFFSET
0,8
REFERENCES
J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Isomer enumeration of polygonal systems..., J. Molec. Struct. (Theochem), 364 (1996), 1-13.
EXAMPLE
Triangle begins
1
1 1
1 1 1
1 2 2 1
2 3 5 2 1
3 8 11 8 3 1
6 16 30 22 13 3 1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Aug 18 2006
STATUS
approved