122709domain: NAppears in sequencesNumber of -n..n arrays of 5 elements with first, second and third differences also in -n..n.at n=7A202126a(0)=1; for n >= 1, a(n) is the number of subsets of [a(0), a(1), ..., a(n-1)] whose sum is equal to a(n-1).at n=35A265853