A098852 Number of triangle-free self-dual configurations of type (n_3).

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 6, 40, 307

Offset: 1

Author

N. J. A. Sloane, Nov 05 2004

Keywords

• nonn
• hard
• more

Links

• A. Betten, G. Brinkmann and T. Pisanski, Counting symmetric configurations v_3, Discrete Appl. Math., 99 (2000), 331-338.

Crossrefs

Cf. A001403, A100001, A023994.