105599domain: NAppears in sequencesa(n) = 625*n^2 - 2*n.at n=12A158373Numerator of Bernoulli(n, -5/7).at n=4A158541a(n) = 66*n^2 - 1.at n=39A158693Numbers with palindromic order 5.at n=31A261912Numbers k such that 437*2^k+1 is prime.at n=5A323147