37425

Appears in sequences

• Numbers n such that phi(phi(n)) + sigma(sigma(n)) is a 4th power.at n=23A172464
• Numbers k such that (38*10^k + 403)/9 is prime.at n=18A295624
• a(n) is the smallest positive integer which can be represented as the sum of distinct nonzero icosahedral numbers in exactly n ways, or -1 if no such integer exists.at n=36A360215
• a(n) is the smallest positive integer which can be represented as the sum of n distinct nonzero tetrahedral numbers in exactly n ways, or -1 if no such integer exists.at n=26A360217