395126domain: NAppears in sequencesNumber of terms in 6th derivative of a function composed with itself n times.at n=29A022816Smallest 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=25A224496