T(n,k)=1/16 the number of (n+1)X(k+1) binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
A183811
T(n,k)=1/16 the number of (n+1)X(k+1) binary arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
Terms
- a(0) =1a(1) =3a(2) =3a(3) =9a(4) =13a(5) =9a(6) =27a(7) =55a(8) =55a(9) =27a(10) =81a(11) =237a(12) =322a(13) =237a(14) =81a(15) =243a(16) =1011a(17) =1953a(18) =1953a(19) =1011a(20) =243a(21) =729a(22) =4341a(23) =11619a(24) =16953a(25) =11619a(26) =4341a(27) =729a(28) =2187a(29) =18567
External references
- oeis: A183811