T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
A238072
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
Terms
- a(0) =256a(1) =1644a(2) =1644a(3) =10700a(4) =16116a(5) =10700a(6) =67056a(7) =157404a(8) =157404a(9) =67056a(10) =438768a(11) =1499348a(12) =2296588a(13) =1499348a(14) =438768a(15) =2752364a(16) =14168952a(17) =27034844a(18) =27034844a(19) =14168952a(20) =2752364a(21) =17963540a(22) =135441648a(23) =363809888a(24) =506608980a(25) =363809888
External references
- oeis: A238072