Number of (n+2) X 4 0..1 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..1 introduced in row major order.
A204375
Number of (n+2) X 4 0..1 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..1 introduced in row major order.
Terms
- a(0) =51a(1) =48a(2) =54a(3) =63a(4) =88a(5) =128a(6) =193a(7) =300a(8) =470a(9) =747a(10) =1196a(11) =1920a(12) =3093a(13) =4992a(14) =8062a(15) =13031a(16) =21072a(17) =34080a(18) =55129a(19) =89188a(20) =144294a(21) =233459a(22) =377732a(23) =611168a(24) =988877a(25) =1600024a(26) =2588878a(27) =4188879a(28) =6777736a(29) =10966592
External references
- oeis: A204375