57551domain: NAppears in sequencesa(n) = (10*n+3)*(10*n+17).at n=23A152579a(n) = n*(7*n^2-12*n+7)/2.at n=26A226451Expansion of Product_{k>=1} B(x^k), where B(x) is the g.f. of A003106.at n=50A327691Numbers m such that 72*m + 1, 576*m + 1, 648*m + 1, 1296*m + 1, and 2592*m + 1 are all primes.at n=15A372187