T(n,k)=Number of nXk 0..4 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..4 introduced in row major order.
A209503
T(n,k)=Number of nXk 0..4 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..4 introduced in row major order.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =5a(4) =6a(5) =5a(6) =15a(7) =57a(8) =57a(9) =15a(10) =52a(11) =690a(12) =1938a(13) =690a(14) =52a(15) =202a(16) =9393a(17) =78135a(18) =78135a(19) =9393a(20) =202a(21) =855a(22) =133380a(23) =3268686a(24) =9502354a(25) =3268686a(26) =133380a(27) =855a(28) =3845a(29) =1920126
External references
- oeis: A209503