5208653241domain: NAppears in sequencesNumber of n X n matrices over GF(3) with characteristic polynomial x^(n-1) * (x-1).at n=4A088671Sum of 5 consecutive powers of 3, starting with a power of 9.at n=8A120353Numbers of the form prime(i)^2^(i-1) or prime(i)^2^(j-1)*prime(j)^2^(i-1) with i and j distinct integers.at n=11A225548