221227

Properties

Appears in sequences

• Primes that are concatenations of k with k + 6.at n=29A032629
• G.f.: A(x) = exp( Sum_{n>=1} G_n(x)^n/n ) where G_n(x) = x + x*G_n(x)^n and A(x) = Sum_{n>=1} a(n)*x^n/floor(n/2)!.at n=12A194558
• Beginning with 7, least prime such that concatenation of first n terms and its digit reversal both are primes.at n=29A379761
• Prime numbersat n=19715