OFFSET
0,7
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
3 4 4 1
12 21 19 4 1
63 138 123 40 7 1
342 864 834 330 73 7 1
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Aug 18 2006
STATUS
approved