Number of (n+2)X(4+2) nonnegative integer arrays with all values the knight distance from the upper left minus as much as 1, with successive minimum path knight move differences either 0 or +1, and any unreachable value zero.
A253420
Number of (n+2)X(4+2) nonnegative integer arrays with all values the knight distance from the upper left minus as much as 1, with successive minimum path knight move differences either 0 or +1, and any unreachable value zero.
Terms
- a(0) =642a(1) =2827a(2) =44729a(3) =316686a(4) =1432500a(5) =3500244a(6) =20832926a(7) =31561966a(8) =110467360a(9) =138633628a(10) =354021418a(11) =407664150a(12) =876980034a(13) =965635182a(14) =1845670842a(15) =1978943526a(16) =3471423154a(17) =3658918494a(18) =6009462826a(19) =6260785942a(20) =9758924834a(21) =10083680846
External references
- oeis: A253420