1285760domain: NAppears in sequencesTriangle T(n,k), 0<=k<=n, read by rows, defined by Sum_{k = 0..n} T(n,k)*x^k = Sum_{k = 0..n} binomial(n,k)*(x+k)^n.at n=31A095677Number of 2 X 2 matrices having all terms in {-n,...,0,..,n} and determinant >= 3n.at n=20A211153