Number of nX3 0..1 arrays with exactly n+3-1 having value 1 and no three 1s forming an isosceles right triangle.

A272960

Number of nX3 0..1 arrays with exactly n+3-1 having value 1 and no three 1s forming an isosceles right triangle.

Terms

    a(0) =1a(1) =1a(2) =0a(3) =1a(4) =9a(5) =6a(6) =16a(7) =66a(8) =95a(9) =177a(10) =493a(11) =1153a(12) =2238a(13) =5011a(14) =11642a(15) =25096a(16) =55321a(17) =123997a(18) =273017a(19) =600569a(20) =1336351a(21) =2963793a(22) =6536040a(23) =14463667a(24) =32057919a(25) =70930270a(26) =156916549a(27) =347367018a(28) =768795181a(29) =1701248904

External references