734517

Appears in sequences

• Numbers n such that sigma(n) = 3*phi(n).at n=16A068391
• Numbers n such that sigma(n) = phi(3n).at n=23A074891
• Number of nondecreasing arrangements of n numbers in -5..5 with sum zero.at n=20A183913
• Number of strictly increasing arrangements of n numbers in -(n+5)..(n+5) with sum zero.at n=9A188179
• Numbers k such that gcd(sigma(k), phi(k)) (A009223) attains record values.at n=43A222711