140364532domain: NAppears in sequencesTriangle, read by rows, where T(n,k) = C( C(n+2,3) - C(k+2,3) + 3, n-k) for n>=k>=0.at n=39A126457a(n) = binomial(prime(3+n), prime(3)).at n=27A126996Number of 6-member subsets of [6*n] whose elements sum to a multiple of n.at n=19A318627