3028410

Appears in sequences

• Number of simple labeled graphs on n+3 nodes with exactly n connected components that are trees or cycles.at n=20A215863
• a(n) = A332560(n)/A332559(n).at n=17A332561
• a(n) = n! / (a(n-1) a(n-2) a(n-3)), where a(0) = a(1) = a(2) = 1.at n=23A372995