148736domain: NAppears in sequencesPeriod of the continued fraction for sqrt(2^n-1).at n=35A059866Numbers n such that n and 2^n end with the same 4 digits.at n=14A067867Numbers n such that n and 2^n end with the same 5 digits.at n=1A067869Number of (w,x,y,z) with all terms in {1,...,n} and w+x>=2y+2z.at n=32A212565