Number of homeomorphically irreducible general graphs on 6 labeled node and with n edges.

A060581

Number of homeomorphically irreducible general graphs on 6 labeled node and with n edges.

Terms

    a(0) =1a(1) =15a(2) =81a(3) =441a(4) =2151a(5) =9957a(6) =43122a(7) =174162a(8) =666267a(9) =2403987a(10) =8183601a(11) =26281065a(12) =79660856a(13) =228180456a(14) =618992466a(15) =1595081266a(16) =3918506466a(17) =9211519476a(18) =20797923546a(19) =45258309066a(20) =95225448306a(21) =194283668576a(22) =385361919996

External references