Number of non-isomorphic connected graphs on n vertices with representation number 2.
A319489
Number of non-isomorphic connected graphs on n vertices with representation number 2.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =5a(4) =20a(5) =109a(6) =788a(7) =8335a(8) =117282a(9) =2026330a(10) =40302424a(11) =892278075
External references
- oeis: A319489