T(n,k)=Number of nXk 0..3 arrays x(i,j) with each element horizontally or vertically 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.
A230805
T(n,k)=Number of nXk 0..3 arrays x(i,j) with each element horizontally or vertically 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) =2a(8) =2a(9) =0a(10) =0a(11) =16a(12) =14a(13) =16a(14) =0a(15) =0a(16) =34a(17) =40a(18) =40a(19) =34a(20) =0a(21) =0a(22) =154a(23) =298a(24) =1370a(25) =298a(26) =154a(27) =0a(28) =0a(29) =432
External references
- oeis: A230805