Number of defective 4-colorings of an n X 4 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order.
A229751
Number of defective 4-colorings of an n X 4 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order.
Terms
- a(0) =3a(1) =422a(2) =2347a(3) =6561a(4) =15075a(5) =32548a(6) =69198a(7) =147376a(8) =315786a(9) =680124a(10) =1468934a(11) =3174760a(12) =6855906a(13) =14780020a(14) =31793694a(15) =68231136a(16) =146079674a(17) =312025516a(18) =665011638a(19) =1414360024a(20) =3002176530a(21) =6360776292a(22) =13453355726a(23) =28408158544a(24) =59894811114
External references
- oeis: A229751