818760domain: NAppears in sequencesNumbers k such that 85*2^k+1 is prime.at n=25A032392a(n)=least number m such that gcd(prime(m)+2,prime(m+1)+2) = 2*n-1.at n=25A268863Triangle T(n,k) defined by Sum_{k=1..n} T(n,k)*u^k*x^n/n! = exp(Sum_{n>0} u*sigma(n)*x^n/n!).at n=47A338871