141497domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n)/100000 gives log_10(n) to 5 places.at n=25A027665Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 68.at n=5A031656Primes of the form 16n^2 + 121.at n=24A202083Prime numbersat n=13137