a(n) is the number of solutions when placing the numbers 1..n in an n X n square according to the rules in the Comments section.
A329094
a(n) is the number of solutions when placing the numbers 1..n in an n X n square according to the rules in the Comments section.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =3a(7) =8a(8) =17a(9) =18a(10) =51a(11) =69a(12) =126a(13) =286a(14) =485a(15) =1180a(16) =2245a(17) =4312a(18) =7247a(19) =19559a(20) =41403a(21) =66454a(22) =161131a(23) =337495a(24) =710899a(25) =1286527a(26) =3069554a(27) =7100614a(28) =15046664a(29) =29090692
External references
- oeis: A329094