197341

Properties

Appears in sequences

• a(1) = 1, a(2) = 2 and a(n) = smallest number not included earlier that divides the concatenation a(n-2), a(n-1).at n=25A085946
• Smallest prime p == 5 (mod 8) such that Q(sqrt(p)) has class number 2n+1.at n=22A355877
• Balanced primes of order 100.at n=3A363168
• Prime numbersat n=17766