Number of primitive Pythagorean triangles with leg n.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =1a(5) =0a(6) =1a(7) =1a(8) =1a(9) =0a(10) =1a(11) =2a(12) =1a(13) =0a(14) =2a(15) =1a(16) =1a(17) =0a(18) =1a(19) =2a(20) =2a(21) =0a(22) =1a(23) =2a(24) =1a(25) =0a(26) =1a(27) =2a(28) =1a(29) =0