Number of lines through at least 2 points of an 8 X n grid of points.

Terms

a(0) =0a(1) =1a(2) =66a(3) =131a(4) =238a(5) =361a(6) =534a(7) =709a(8) =938a(9) =1183a(10) =1470a(11) =1759a(12) =2104a(13) =2459a(14) =2870a(15) =3287a(16) =3740a(17) =4209a(18) =4734a(19) =5261a(20) =5844a(21) =6437a(22) =7070a(23) =7711a(24) =8408a(25) =9115a(26) =9872a(27) =10637a(28) =11444a(29) =12265