Number of (n+2)X(1+2) nonnegative integer arrays with all values the knight distance from the upper left minus as much as 3, with successive minimum path knight move differences either 0 or +1, and any unreachable value zero.
A253335
Number of (n+2)X(1+2) nonnegative integer arrays with all values the knight distance from the upper left minus as much as 3, with successive minimum path knight move differences either 0 or +1, and any unreachable value zero.
Terms
- a(0) =69a(1) =488a(2) =1928a(3) =7494a(4) =27015a(5) =87621a(6) =319172a(7) =945613a(8) =2874539a(9) =6935762a(10) =22983454a(11) =49969332a(12) =119548267a(13) =214145613a(14) =622017082a(15) =1069718995a(16) =2070309209a(17) =3028231177a(18) =7700984072a(19) =11401562937a(20) =19017598555a(21) =24702675207a(22) =56114922678a(23) =75683326471
External references
- oeis: A253335