157824
domain: N
Appears in sequences
- Triangle: a(n,m) = number of permutations of (1,2,...,n) with one or more fixed points in the m first positions.at n=40A061018
- a(n) = smallest possible (product of b(k)'s + product of c(k)'s), where the positive integers <= n are partitioned somehow into {b(k)} and {c(k)}.at n=13A127180
- a(n) = 4*a(n-1) + 10*a(n-2), with a(1)=0 and a(2)=1.at n=8A180226