Number of distinct characteristic polynomials among all connected graphs on n nodes.

A245880

Number of distinct characteristic polynomials among all connected graphs on n nodes.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =21a(5) =111a(6) =821a(7) =10423a(8) =236064a(9) =10375796

External references