T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with row and column sums nondecreasing, and no adjacent elements equal.
A233031
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with row and column sums nondecreasing, and no adjacent elements equal.
Terms
- a(0) =34a(1) =96a(2) =96a(3) =333a(4) =642a(5) =333a(6) =912a(7) =3132a(8) =3132a(9) =912a(10) =2874a(11) =16296a(12) =55642a(13) =16296a(14) =2874a(15) =8070a(16) =77353a(17) =566933a(18) =566933a(19) =77353a(20) =8070a(21) =25028a(22) =337570a(23) =7169782a(24) =12724788a(25) =7169782a(26) =337570a(27) =25028a(28) =71492a(29) =1459711
External references
- oeis: A233031