A241842 Number of simple connected graphs on n nodes that are non-integral.

0, 0, 1, 4, 18, 106, 846, 11095, 261056, 11716488, 1006700452

Offset: 1

Author

Travis Hoppe and Anna Petrone, Apr 29 2014

Keywords

• nonn
• less
• more

Links

• Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs
• Travis Hoppe and Anna Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644 [math.CO], 2014.
• Eric Weisstein's World of Mathematics, Integral Graph

Crossrefs

Cf. A001349, A064731.

Formula

a(n) = A001349(n) - A064731(n).