103615domain: NAppears in sequencesa(n) = Lucas(n+4) - (3*n+7).at n=19A023537T(2n+1,n+1), T given by A027011.at n=10A027016Numbers k such that d(k) > d(k+1) > d(k+2) > d(k+3) > d(k+4), where d(n) is the number of divisors of n.at n=15A364720