-6518domain: ZAppears in sequencesTriangle T(n,k) = 1 + A176304(k) + A176304(n-k) - A176304(n), read by rows.at n=31A176307Triangle T(n,k) = 1 + A176304(k) + A176304(n-k) - A176304(n), read by rows.at n=32A176307a(n) = - Sum_{d|n} (-n/d)^d * binomial(d+n/d-1, d).at n=17A338683