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 4,4,0,0,1 for x=0,1,2,3,4.
A197098
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 4,4,0,0,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =7a(5) =2a(6) =3a(7) =18a(8) =18a(9) =3a(10) =5a(11) =55a(12) =74a(13) =55a(14) =5a(15) =8a(16) =163a(17) =384a(18) =384a(19) =163a(20) =8a(21) =13a(22) =484a(23) =1880a(24) =3477a(25) =1880a(26) =484a(27) =13a(28) =21a(29) =1439
External references
- oeis: A197098