Number of (n+2)X(2+2) nonnegative integer arrays with all values the knight distance from the upper left minus as much as 2, with successive minimum path knight move differences either 0 or +1, and any unreachable value zero.
A253113
Number of (n+2)X(2+2) nonnegative integer arrays with all values the knight distance from the upper left minus as much as 2, with successive minimum path knight move differences either 0 or +1, and any unreachable value zero.
Terms
- a(0) =272a(1) =920a(2) =6334a(3) =28600a(4) =139760a(5) =502272a(6) =2259097a(7) =5670421a(8) =21399557a(9) =39120366a(10) =120865988a(11) =183106294a(12) =479657064a(13) =649963111a(14) =1500762543a(15) =1895383751a(16) =3973980189a(17) =4787211558a(18) =9308563998a(19) =10844855216a(20) =19852566186a(21) =22566185885
External references
- oeis: A253113