A287154 Number of simple disconnected integral graphs on n vertices.

0, 1, 2, 4, 7, 14, 26, 49, 97, 186, 379

Offset: 1

Author

Eric W. Weisstein, May 20 2017

Keywords

• nonn
• more

Links

• Eric Weisstein's World of Mathematics, Disconnected Graph
• Eric Weisstein's World of Mathematics, Integral Graph

Crossrefs

Cf. A077027 (number of simple not necessarily connected integral graphs).

Cf. A064731 (number of simple connected integral graphs).

Formula

a(n) = A077027(n) - A064731(n).