Number of right triangles on an (n+1) X 3 grid.

Terms

a(0) =14a(1) =44a(2) =94a(3) =158a(4) =238a(5) =330a(6) =434a(7) =550a(8) =678a(9) =818a(10) =970a(11) =1134a(12) =1310a(13) =1498a(14) =1698a(15) =1910a(16) =2134a(17) =2370a(18) =2618a(19) =2878a(20) =3150a(21) =3434a(22) =3730a(23) =4038a(24) =4358a(25) =4690a(26) =5034a(27) =5390a(28) =5758a(29) =6138