104033domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(0) = 0, a(1) = 1 and for n >= 2, a(n) = floor(sqrt(2 * (a(n-2)^2 + a(n-1)^2))).at n=25A093332Primes of the form 10n^2 - 7.at n=13A201963Prime numbersat n=9937