42053domain: NAppears in sequencesNumber of 4 X n 0..1 arrays with rows unimodal and antidiagonals nondecreasing.at n=9A224411Expansion of g.f. A(x) satisfying 1 = Sum_{n=-oo..+oo} (-1)^n * x^n * (A(x) + x^(4*n-1))^(n+1).at n=19A363144