T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions but not both.

A234777

T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions but not both.

Terms

    a(0) =88a(1) =454a(2) =454a(3) =2056a(4) =3980a(5) =2056a(6) =10076a(7) =28840a(8) =28840a(9) =10076a(10) =46804a(11) =247394a(12) =301776a(13) =247394a(14) =46804a(15) =226072a(16) =1912554a(17) =4255966a(18) =4255966a(19) =1912554a(20) =226072a(21) =1060636a(22) =16146124a(23) =49077768a(24) =110820444a(25) =49077768a(26) =16146124a(27) =1060636a(28) =5086576a(29) =127371542

External references