Number of distinct proper angles that can be formed by a vertex and two leg endpoints on grid points in an n X n square grid.

A252591

Number of distinct proper angles that can be formed by a vertex and two leg endpoints on grid points in an n X n square grid.

Terms

    a(0) =2a(1) =10a(2) =28a(3) =66a(4) =154a(5) =269a(6) =473a(7) =781a(8) =1156a(9) =1689a(10) =2537a(11) =3230a(12) =4635a(13) =6012a(14) =7639a(15) =9755a(16) =12876a(17) =15295a(18) =19533a(19) =23640a(20) =27935a(21) =32992a(22) =40558a(23) =46074a(24) =55514a(25) =64464a(26) =74191a(27) =84280a(28) =99179a(29) =109179

External references