Number of open knight's tour diagrams of a 3 X n chessboard that have "type F": the endpoints occur in different columns and agree in color with the cells in the nearest corner.
A169771
Number of open knight's tour diagrams of a 3 X n chessboard that have "type F": the endpoints occur in different columns and agree in color with the cells in the nearest corner.
Terms
- a(0) =2a(1) =0a(2) =0a(3) =52a(4) =224a(5) =520a(6) =1616a(7) =10320a(8) =37024a(9) =125120a(10) =441200a(11) =1798576a(12) =6327472a(13) =22985504a(14) =81178008a(15) =301420176a(16) =1057619944a(17) =3818476576a(18) =13412523392a(19) =48285742208a(20) =168992600680a(21) =602349395456
External references
- oeis: A169771