8388629domain: NAppears in sequencesa(n) = 2^(n+1) + n - 1.at n=22A083706Duplicate of A083706.at n=22A122039a(n) = smallest multiple of n which is >= 2^n.at n=22A128093a(n) = Sum_{k=1..n} binomial(n,k) * gcd(k,n).at n=22A159068a(n) = Sum_{d|n} phi(n/d) * (2^d - 1).at n=22A346558