A376071 Number of (non-null) regular subgraphs of a complete graph having n labeled vertices.
1, 4, 11, 32, 99, 452, 2829, 59728, 1548859, 168927280, 12165067397, 7074423251656, 2294426405588381, 4218009215702408336, 3810376434461485027083, 35102248193591661086986784, 156873334244228518638713218203, 4144940994226400702145709978496296
Offset: 1
Keywords
Crossrefs
Cf. A295193.
Formula
a(n) = Sum_{k=1..n} binomial(n,k)*A295193(k). - Andrew Howroyd, Sep 08 2024
Extensions
a(9) onwards from Andrew Howroyd, Sep 08 2024