T(n,k) = Number of n X k 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X (k+1) binary array having determinant equal to one.
A227751
T(n,k) = Number of n X k 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X (k+1) binary array having determinant equal to one.
Terms
- a(0) =2a(1) =4a(2) =4a(3) =7a(4) =13a(5) =7a(6) =13a(7) =40a(8) =40a(9) =13a(10) =24a(11) =129a(12) =210a(13) =129a(14) =24a(15) =44a(16) =409a(17) =1122a(18) =1122a(19) =409a(20) =44a(21) =81a(22) =1300a(23) =6002a(24) =10092a(25) =6002a(26) =1300a(27) =81a(28) =149a(29) =4137
External references
- oeis: A227751