Number of right triangles on a (n+1) X 4 grid.

Terms

a(0) =28a(1) =94a(2) =200a(3) =342a(4) =524a(5) =732a(6) =972a(7) =1236a(8) =1524a(9) =1840a(10) =2180a(11) =2544a(12) =2932a(13) =3344a(14) =3780a(15) =4240a(16) =4724a(17) =5232a(18) =5764a(19) =6320a(20) =6900a(21) =7504a(22) =8132a(23) =8784a(24) =9460a(25) =10160a(26) =10884a(27) =11632a(28) =12404a(29) =13200