156332domain: NAppears in sequencesa(n) = n^2*(2*n^2 + 1)/3.at n=22A071270Number of ordered quadruples (i,j,k,l) in range [0..n] satisfying i == j (mod 2), j == k (mod 3) and k == l (mod 4).at n=43A115523Pentagonal numbers (A000326) that are the product of 2 palindromes greater than 1.at n=24A115745