T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).
A230675
T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).
Terms
- a(0) =0a(1) =3a(2) =0a(3) =3a(4) =15a(5) =0a(6) =9a(7) =87a(8) =81a(9) =0a(10) =15a(11) =513a(12) =1173a(13) =423a(14) =0a(15) =33a(16) =3387a(17) =18915a(18) =17271a(19) =2247a(20) =0a(21) =63a(22) =21933a(23) =340563a(24) =730503a(25) =251595a(26) =11925a(27) =0a(28) =129a(29) =141411
External references
- oeis: A230675