Perimeters of integer-sided right triangles.

Terms

a(0) =12a(1) =24a(2) =30a(3) =36a(4) =40a(5) =48a(6) =56a(7) =60a(8) =70a(9) =72a(10) =80a(11) =84a(12) =90a(13) =96a(14) =108a(15) =112a(16) =120a(17) =126a(18) =132a(19) =140a(20) =144a(21) =150a(22) =154a(23) =156a(24) =160a(25) =168a(26) =176a(27) =180a(28) =182a(29) =192