74289domain: NAppears in sequencesNumber of n X 3 0..1 arrays with each 1 adjacent to 0 or 3 king-move neighboring 1's.at n=9A295913G.f. A(x) = Sum_{n>=0} a(n)*x^n where a(n) = Sum_{k=0..n} ( [x^k] A(2*x)^(n+1) (mod 2^(n+1)) ) for n >= 0 with a(0) = 1.at n=13A371715