Number of n X 3 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.
A207656
Number of n X 3 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.
Terms
- a(0) =6a(1) =36a(2) =84a(3) =198a(4) =474a(5) =1140a(6) =2748a(7) =6630a(8) =16002a(9) =38628a(10) =93252a(11) =225126a(12) =543498a(13) =1312116a(14) =3167724a(15) =7647558a(16) =18462834a(17) =44573220a(18) =107609268a(19) =259791750a(20) =627192762a(21) =1514177268a(22) =3655547292a(23) =8825271846a(24) =21306090978a(25) =51437453796a(26) =124180998564
External references
- oeis: A207656