-11970domain: ZAppears in sequencesa(n) = n^3 * Sum_{d|n} (-1)^(n/d + 1) * mu(d) / d^3.at n=21A338548T(n, k) = ((2*n + 1)/2)*Sum_{j, k, n} (-1)^(k + j)*(n + j)*binomial(2*n, n - j)* Stirling2(n - k + j, 1 - k + j) with T(0, 0) = 1. Triangle read by row, T(n, k) for 0 <= k <= n.at n=34A342312