T(n,k)=Number of nXk 0..n+k-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.
A265458
T(n,k)=Number of nXk 0..n+k-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =12a(4) =18a(5) =12a(6) =66a(7) =250a(8) =250a(9) =66a(10) =360a(11) =3358a(12) =7422a(13) =3358a(14) =360a(15) =1864a(16) =42282a(17) =216466a(18) =216466a(19) =42282a(20) =1864a(21) =9358a(22) =502154a(23) =6056182a(24) =13943772a(25) =6056182a(26) =502154a(27) =9358a(28) =45642a(29) =5710302
External references
- oeis: A265458