38018domain: NAppears in sequencesNumbers whose least quadratic nonresidue (A020649) is 17.at n=32A025026First of 3 or more consecutive integers with equal values of phi(phi(n)).at n=26A167767Numbers n such that A003146(n) = floor(alpha^3*n)+1, where alpha = 1.839... is the positive real zero of x^3-x^2-x-1.at n=37A278353