Table read by antidiagonals upward: T(n,k) is the number of ways to move a chess queen from (1,1) to (n,k) in the first quadrant using only right, diagonal up-right, and diagonal up-left moves.

A334016

Table read by antidiagonals upward: T(n,k) is the number of ways to move a chess queen from (1,1) to (n,k) in the first quadrant using only right, diagonal up-right, and diagonal up-left moves.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =6a(6) =4a(7) =10a(8) =21a(9) =35a(10) =8a(11) =25a(12) =65a(13) =139a(14) =237a(15) =16a(16) =60a(17) =179a(18) =451a(19) =978a(20) =1684a(21) =32a(22) =140a(23) =470a(24) =1337a(25) =3339a(26) =7239a(27) =12557a(28) =64a(29) =320

External references