192215domain: NAppears in sequencesSmallest k such that k*2*p(n)^2+1=q is prime, k*2*q^2+1=r, k*2*r^2+1=s, k*2*r^2+1=t, r, s, and t are also prime.at n=7A224496Number of connected graphs with n integer labeled vertices covering an initial interval of positive integers.at n=6A340026