T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.
A183976
T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.
Terms
- a(0) =128a(1) =992a(2) =992a(3) =7688a(4) =13168a(5) =7688a(6) =64976a(7) =180236a(8) =180236a(9) =64976a(10) =549152a(11) =2735260a(12) =4470575a(13) =2735260a(14) =549152a(15) =4780976a(16) =41834260a(17) =124987628a(18) =124987628a(19) =41834260a(20) =4780976a(21) =41623688a(22) =664848772a(23) =3536846184a(24) =6533126804a(25) =3536846184a(26) =664848772
External references
- oeis: A183976