T(n,k)=Number of nXk 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero.
A230840
T(n,k)=Number of nXk 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally 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) =22a(8) =22a(9) =0a(10) =0a(11) =162a(12) =656a(13) =162a(14) =0a(15) =0a(16) =1202a(17) =16496a(18) =16496a(19) =1202a(20) =0a(21) =0a(22) =8974a(23) =416540a(24) =1361842a(25) =416540a(26) =8974a(27) =0a(28) =0a(29) =66990
External references
- oeis: A230840