T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having an odd sum, with rows and columns of the latter in lexicographically nondecreasing order.

A227679

T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having an odd sum, with rows and columns of the latter in lexicographically nondecreasing order.

Terms

    a(0) =2a(1) =4a(2) =4a(3) =7a(4) =16a(5) =7a(6) =11a(7) =50a(8) =50a(9) =11a(10) =16a(11) =131a(12) =283a(13) =131a(14) =16a(15) =22a(16) =301a(17) =1343a(18) =1343a(19) =301a(20) =22a(21) =29a(22) =625a(23) =5434a(24) =11971a(25) =5434a(26) =625a(27) =29a(28) =37a(29) =1198

External references