661249domain: NAppears in sequencesNumerators of continued fraction convergents to sqrt(574).at n=7A042100a(n) = 648*n^2 - 72*n + 1.at n=31A154514a(n) = 10368*n^2 - 288*n + 1.at n=7A157288a(n) = 2048*n^2 - 128*n + 1.at n=17A157448