T(n,k)=1/6 the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock containing all three values.
A183603
T(n,k)=1/6 the number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock containing all three values.
Terms
- a(0) =6a(1) =27a(2) =27a(3) =120a(4) =204a(5) =120a(6) =534a(7) =1479a(8) =1479a(9) =534a(10) =2376a(11) =10797a(12) =17174a(13) =10797a(14) =2376a(15) =10572a(16) =78729a(17) =201770a(18) =201770a(19) =78729a(20) =10572a(21) =47040a(22) =574185a(23) =2366412a(24) =3831324a(25) =2366412a(26) =574185a(27) =47040a(28) =209304a(29) =4187499
External references
- oeis: A183603