3295144749domain: NAppears in sequencesTriangle, read by rows, where T(n,k) = C( C(n+2,3) - C(k+2,3) + 2, n-k) for n>=k>=0.at n=38A126454Number of 7-member subsets of [7*n] whose elements sum to a multiple of n.at n=17A318628