43507domain: NAppears in sequencesa(n) = 36*n^2 - 17*n + 2.at n=34A157265G.f.: A(x) = exp( Sum_{n>=1} x^n/n * (1 + x^n*A(x)^(2*n)) / (1 + x^n*A(x)^n) ).at n=15A307231Regular triangle read by rows, T(n,k) is the number of derangements of [n] with exactly k right-to-left minima, for n >= 2 and 1 <= k <= n-1.at n=29A344437