188505domain: NAppears in sequencesNumber of -6..6 arrays of n elements with first, second and third differences also in -6..6.at n=5A202122Number of -n..n arrays of 6 elements with first, second and third differences also in -n..n.at n=5A202127Numbers k such that 3*k+1 divides 3^k+1.at n=6A222948