4349160domain: NAppears in sequences10000-gonal numbers: a(n) = n + 4999 * n * (n-1).at n=30A167149a(0) = 0, a(1) = 1 and a(n) = 2*a(n-1)/(n-1) + 16*a(n-2) for n > 1.at n=12A304933