Number of integer-sided triangles with all sides <= n and sides relatively prime.

Terms

a(0) =1a(1) =2a(2) =5a(3) =9a(4) =17a(5) =24a(6) =39a(7) =53a(8) =74a(9) =94a(10) =129a(11) =155a(12) =203a(13) =242a(14) =294a(15) =346a(16) =426a(17) =483a(18) =582a(19) =658a(20) =760a(21) =855a(22) =998a(23) =1098a(24) =1258a(25) =1390a(26) =1561a(27) =1711a(28) =1935a(29) =2083