332708domain: NAppears in sequencesa(n) = Sum_{k=0..n} T(n,k) * T(n,n+k), with T given by A027052.at n=10A027078Number of -1..1 arrays x(0..n-1) of n elements with zero sum and no two consecutive declines, no adjacent equal elements, and no element more than one greater than the previous (random base sawtooth pattern).at n=35A200174