Number of n X 2 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.
A230835
Number of n X 2 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) =2a(2) =22a(3) =162a(4) =1202a(5) =8974a(6) =66990a(7) =500018a(8) =3732178a(9) =27857358a(10) =207930158a(11) =1552011826a(12) =11584373970a(13) =86466944462a(14) =645398059822
External references
- oeis: A230835