Number of lines through at least 2 points of a 4 X n grid of points.

Terms

a(0) =0a(1) =1a(2) =18a(3) =35a(4) =62a(5) =93a(6) =136a(7) =181a(8) =238a(9) =299a(10) =370a(11) =445a(12) =532a(13) =621a(14) =722a(15) =827a(16) =942a(17) =1061a(18) =1192a(19) =1325a(20) =1470a(21) =1619a(22) =1778a(23) =1941a(24) =2116a(25) =2293a(26) =2482a(27) =2675a(28) =2878a(29) =3085