59423domain: NAppears in sequencesAlkane (or paraffin) numbers l(8,n).at n=24A005995Convolution of nonzero hexagonal numbers (A000384) with themselves.at n=12A271870Number of n-element subsets of [n+5] having an even sum.at n=24A282081a(n) = n * n!! - Sum_{k=1..n-1} k!! * a(n-k).at n=10A330436