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A376071
Number of (non-null) regular subgraphs of a complete graph having n labeled vertices.
0
1, 4, 11, 32, 99, 452, 2829, 59728, 1548859, 168927280, 12165067397, 7074423251656, 2294426405588381, 4218009215702408336, 3810376434461485027083, 35102248193591661086986784, 156873334244228518638713218203, 4144940994226400702145709978496296
OFFSET
1,2
FORMULA
a(n) = Sum_{k=1..n} binomial(n,k)*A295193(k). - Andrew Howroyd, Sep 08 2024
CROSSREFS
Cf. A295193.
Sequence in context: A025268 A178520 A306419 * A149232 A149233 A273038
KEYWORD
nonn
AUTHOR
Maharshee K. Shah, Sep 08 2024
EXTENSIONS
a(9) onwards from Andrew Howroyd, Sep 08 2024
STATUS
approved