T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions or both.

A235223

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with 2X2 edge jumps all no more than +1 in one of the clockwise or counterclockwise directions or both.

Terms

    a(0) =59a(1) =427a(2) =427a(3) =3037a(4) =8029a(5) =3037a(6) =21693a(7) =145669a(8) =145669a(9) =21693a(10) =154811a(11) =2667851a(12) =6630699a(13) =2667851a(14) =154811a(15) =1105027a(16) =48751703a(17) =306034401a(18) =306034401a(19) =48751703a(20) =1105027a(21) =7887229a(22) =891368897a(23) =14077755879a(24) =35761397619a(25) =14077755879a(26) =891368897

External references