1015309

Properties

Appears in sequences

• a(1) = a(2) = 1, a(n) is largest prime factor of concatenation of a(n - 2) and a(n - 1).at n=10A034969
• Primes p such that 2p^2-1, 3p^2-2, 4p^2-3, and 5p^2-4 are also prime.at n=14A213107
• Prime numbersat n=79629