50917674domain: NAppears in sequencesNumber of -7..7 arrays x(0..n-1) of n elements with nonzero sum and with zero through n-1 differences all nonzero.at n=6A200164Number of -n..n arrays x(0..6) of 7 elements with nonzero sum and with zero through 6 differences all nonzero.at n=6A200170