One-sixth the smallest semiperimeter common to exactly n Pythagorean triangles.

Terms

a(0) =1a(1) =5a(2) =10a(3) =20a(4) =35a(5) =60a(6) =60a(7) =110a(8) =70a(9) =220a(10) =140a(11) =280a(12) =210a(13) =385a(14) =660a(15) =630a(16) =420a(17) =840a(18) =1430a(19) =910a(20) =770a(21) =3360a(22) =2100a(23) =2380a(24) =1820a(25) =1540a(26) =5040a(27) =3465a(28) =3850a(29) =3080