Number of lines through at least 2 points of a 5 X n grid of points.

Terms

a(0) =0a(1) =1a(2) =27a(3) =52a(4) =93a(5) =140a(6) =207a(7) =274a(8) =361a(9) =454a(10) =563a(11) =676a(12) =809a(13) =944a(14) =1099a(15) =1258a(16) =1433a(17) =1614a(18) =1815a(19) =2016a(20) =2237a(21) =2464a(22) =2707a(23) =2954a(24) =3221a(25) =3490a(26) =3779a(27) =4072a(28) =4381a(29) =4696