0,8

J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Isomer enumeration of polygonal systems..., J. Molec. Struct. (Theochem), 364 (1996), 1-13.

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

Columns give A002215, A121133-A121136.

Sequence in context: A071444 A085257 A072549 this_sequence A113825 A011138 A022479

Adjacent sequences: A120649 A120650 A120651 this_sequence A120653 A120654 A120655

nonn,tabl

njas, Aug 18 2006