A294405 Number of connected weakly regular graphs on n nodes.

0, 0, 0, 0, 0, 2, 3, 14, 19, 162

Offset: 1

Author

Eric W. Weisstein, Oct 30 2017

Keywords

• nonn
• more

Links

• Eric Weisstein's World of Mathematics, Connected Graph
• Eric Weisstein's World of Mathematics, Weakly Regular Graph

Crossrefs

Cf. A005177 (connected regular graphs).

Cf. A076434 (not-necessarily connected weakly regular graphs).

Cf. A088741 (connected strongly regular graphs).

Formula

a(n) = A005177(n) - A088741(n). - Andrew Howroyd, Sep 03 2019