198829domain: NPropertiesPrimalityPrimeyesAppears in sequencesSolutions to A096509[x]=7; number of prime-powers [including primes] in the neighborhood of x with Ceiling[Log[x]] radius equals 7.at n=28A096518Exponential generating function (1-x^2)^(-1/x).at n=9A121452Prime numbersat n=17890