135604domain: NAppears in sequencesa(n) = 2*(a(n-1) + a(n-2) + a(n-3)) - a(n-4) for n >= 4, with initial terms 0,1,0,1.at n=14A192234Self-convolution of n-th antidiagonal of the natural number array (so named in the Comments section of A000027).at n=13A387429