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 upper left element zero.
A230250
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 upper left element zero.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =2a(5) =0a(6) =0a(7) =6a(8) =6a(9) =0a(10) =0a(11) =26a(12) =34a(13) =26a(14) =0a(15) =0a(16) =118a(17) =514a(18) =514a(19) =118a(20) =0a(21) =0a(22) =522a(23) =5838a(24) =18218a(25) =5838a(26) =522a(27) =0a(28) =0a(29) =2310
External references
- oeis: A230250