T(n,k)=1/4 the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences.
A209716
T(n,k)=1/4 the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having distinct clockwise edge differences.
Terms
- a(0) =24a(1) =175a(2) =175a(3) =1241a(4) =2710a(5) =1241a(6) =8876a(7) =40600a(8) =40600a(9) =8876a(10) =63280a(11) =614935a(12) =1277340a(13) =614935a(14) =63280a(15) =451762a(16) =9278940a(17) =40731729a(18) =40731729a(19) =9278940a(20) =451762a(21) =3223192a(22) =140274002a(23) =1293734407a(24) =2744311427a(25) =1293734407a(26) =140274002a(27) =3223192a(28) =23003132
External references
- oeis: A209716