T(n,k)=Number of nXk 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.
A199647
T(n,k)=Number of nXk 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =2a(7) =13a(8) =13a(9) =2a(10) =3a(11) =60a(12) =112a(13) =60a(14) =3a(15) =6a(16) =288a(17) =1265a(18) =1265a(19) =288a(20) =6a(21) =11a(22) =1384a(23) =12748a(24) =29229a(25) =12748a(26) =1384a(27) =11a(28) =22a(29) =6628
External references
- oeis: A199647