137831

Properties

Appears in sequences

• Primes p such that p, p+18, p+36 are consecutive primes.at n=31A052189
• Emirps (A006567) whose difference with the reversal is a perfect square.at n=14A217386
• 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=38A360217
• Prime numbersat n=12827