A057560 Weakly distance-regular digraphs on n nodes (excluding distance-regular graphs).

0, 0, 1, 2, 1, 6, 2, 12, 6, 5, 2, 34, 2, 9, 19, 44, 1, 46, 3, 31, 17

Offset

1,4

Links

Table of n, a(n) for n=1..21.

A. Hanaki and I. Miyamoto, Classification of association schemes with small vertices

Akihide Hanaki and Izumi Miyamoto, Classification of primitive association schemes of order up to 22, Kyushu J. Math., 54 (2000), 81-86.

Y. Suga, Association schemes with up to 15 vertices [Broken link]

Crossrefs

Cf. A057495, A057498, A057499.

Sequence in context: A363596 A354280 A239148 * A085592 A174421 A089849

Adjacent sequences: A057557 A057558 A057559 * A057561 A057562 A057563

Keyword

nonn,nice,more

Author

N. J. A. Sloane, Oct 01 2000

Status

approved