A098822 Number of cyclic configurations of type (n_3).

0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 3, 2, 3, 4, 4, 2, 5, 3

Offset

1,12

Links

Table of n, a(n) for n=1..19.

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

T. Pisanski, M. Boben, D. Marušic, A. Orbanic, A. Graovac, The 10-cages and derived configurations, Discrete Math. 275 (2004), 265-276.

Crossrefs

Cf. A001403, A023994.

Sequence in context: A275769 A094365 A272886 * A131597 A077070 A075988

Adjacent sequences: A098819 A098820 A098821 * A098823 A098824 A098825

Keyword

nonn,hard,more

Author

N. J. A. Sloane, Nov 05 2004

Extensions

a(1)-a(18) from the Betten, Brinkmann and Pisanski article.

a(19) from the Pisanski et al. article.

Status

approved