T(n,k)=Number of nXk 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, vertically or antidiagonally, and no adjacent values equal.
A232161
T(n,k)=Number of nXk 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, vertically or antidiagonally, and no adjacent values equal.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =4a(4) =18a(5) =4a(6) =8a(7) =62a(8) =62a(9) =8a(10) =14a(11) =218a(12) =290a(13) =218a(14) =14a(15) =26a(16) =746a(17) =1284a(18) =1284a(19) =746a(20) =26a(21) =48a(22) =2600a(23) =5902a(24) =7770a(25) =5902a(26) =2600a(27) =48a(28) =88a(29) =9004
External references
- oeis: A232161