T(n,k)=Number of zero-sum nXk -1..1 arrays with every element equal to at least one horizontal or vertical neighbor.
A201847
T(n,k)=Number of zero-sum nXk -1..1 arrays with every element equal to at least one horizontal or vertical neighbor.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =3a(7) =25a(8) =25a(9) =3a(10) =1a(11) =97a(12) =125a(13) =97a(14) =1a(15) =9a(16) =411a(17) =2019a(18) =2019a(19) =411a(20) =9a(21) =7a(22) =1897a(23) =17031a(24) =54773a(25) =17031a(26) =1897a(27) =7a(28) =25a(29) =8741
External references
- oeis: A201847