T(n,k) = number of n X k 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, and upper left element zero.
A231080
T(n,k) = number of n X k 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, and upper left element zero.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =2a(5) =0a(6) =0a(7) =14a(8) =2a(9) =0a(10) =0a(11) =40a(12) =50a(13) =16a(14) =0a(15) =0a(16) =356a(17) =136a(18) =784a(19) =34a(20) =0a(21) =0a(22) =1840a(23) =2820a(24) =6400a(25) =5098a(26) =154a(27) =0a(28) =0a(29) =10128
External references
- oeis: A231080