74375

Appears in sequences

• Expansion of (1-25*x)^(-2/5).at n=4A049380
• Numbers k such that S(k)=d(k), where S(k) is the Kempner function (A002034) and d(k) is the number of divisors of k (A000005).at n=30A073307
• Numbers n such that number of divisors of n divides S(n), the Kempner function A002034.at n=41A073413
• a(n) = n*(n+1)*(11*n+1)/6.at n=34A132112
• Number of solutions to x^3 + y^3 + z^3 + t^3 == 0 (mod n) for 1 <= x, y, z, t <= n.at n=34A276920
• a(n) is the least odd number k such that A376615(k) = n, or -1 if no such number exists.at n=4A376619