Sums of area and perimeter of primitive Pythagorean triples.

Terms

a(0) =18a(1) =60a(2) =100a(3) =140a(4) =270a(5) =280a(6) =294a(7) =462a(8) =648a(9) =728a(10) =756a(11) =1078a(12) =1080a(13) =1210a(14) =1496a(15) =1530a(16) =1584a(17) =1768a(18) =2028a(19) =2090a(20) =2574a(21) =2772a(22) =2860a(23) =2990a(24) =3150a(25) =3588a(26) =3910a(27) =4550a(28) =4624a(29) =4680