T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4.
A197409
T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =3a(2) =3a(3) =4a(4) =9a(5) =4a(6) =5a(7) =20a(8) =20a(9) =5a(10) =9a(11) =71a(12) =60a(13) =71a(14) =9a(15) =16a(16) =227a(17) =358a(18) =358a(19) =227a(20) =16a(21) =25a(22) =664a(23) =1626a(24) =3305a(25) =1626a(26) =664a(27) =25a(28) =39a(29) =2107
External references
- oeis: A197409