125010domain: NAppears in sequencesa(n) = Sum_{k=0..n} T(n,k), T given by A026725.at n=16A026732Number of numbers k in interval [(p_n)^2+1, (p_n)^4] for which lpf(k-3)>lpf(k-1)>=p_n, where p_n=prime(n) and lpf = A020639.at n=15A243803