389455

Appears in sequences

• Numbers k such that the product of Euler phi of the 2 consecutive integers {k,k+1} is a 4th power: if sqrt(sqrt(phi(k)*phi(k+1))) is an integer, then k is here.at n=22A082788
• Min{m: n = Sum((m mod (1+k*L(n)!))*2^(k-1): 1<=k<=L(n))}, where L(n) = length of binary representation of n, cf. A070939, A000142.at n=10A094096