14407956domain: NAppears in sequencesa(n) = 3^(n*(n-1)/2) + 3^(n*(n+1)/2) for n > 0, with a(0) = 1.at n=5A337969a(n) = n^5 * Product_{p|n, p prime} (1 + 1/p^5).at n=26A351300a(n) = n^5 * Sum_{d^2|n} 1 / d^5.at n=26A351603