2621440000domain: NAppears in sequencesa(n)=Product{k=0..n, 1+3^A101650(k)}/2.at n=16A101658Squares that become cubes when their rightmost digit is removed.at n=13A226354Numerators of the terms of Lehmer's series S_2(2), where S_k(x) = Sum_{n>=1} n^k*x^n/binomial(2*n, n).at n=24A259852