107869

Appears in sequences

• G.f.: A(x) = exp( Sum_{n>=1} A162552(n)^2*x^n/n ) where the l.g.f. of A162552 is the log of the characteristic function of the squares.at n=25A162553
• Smallest i such that prime(n) divides gcd(sigma(i), phi(i)) (cf. A009223).at n=18A222714
• Numbers n for which A326073(n) is equal to abs(1+A326146(n)).at n=23A326074