172260

Appears in sequences

• a(n) is square mod a(i), i < n; a(n) nonsquare; a(1) = 2.at n=23A034901
• a(n) = Sum_{k=1..prime(n)-1} floor(k^3/prime(n)).at n=23A078837
• Numbers n such that sigma(n) = 15*phi(n) (where sigma=A000203, phi=A000010).at n=7A171260