4,1

F. C. Bussemaker, R. A. Mathon and J. J. Seidel, Tables of two-graphs, T.H.-Report 79-WSK-05, Technological University Eindhoven, Dept. Mathematics, 1979; also pp. 71-112 of "Combinatorics and Graph Theory (Calcutta, 1980)", Lect. Notes Math. 885, 1981.

Cf. A002854.

Sequence in context: A132007 A094605 A085619 this_sequence A050047 A056381 A019463

Adjacent sequences: A085617 A085618 A085619 this_sequence A085621 A085622 A085623

nonn

N. J. A. Sloane (njas(AT)research.att.com), Jul 11 2003