Integers k such that there exists an integer 0<m<k such that sigma(m)^2 + sigma(k)^2 = (m+k)^2.

Terms

a(0) =3a(1) =33a(2) =69a(3) =77a(4) =133a(5) =161a(6) =235a(7) =267a(8) =287a(9) =321a(10) =385a(11) =699a(12) =715a(13) =1235a(14) =1379a(15) =1437a(16) =1529a(17) =1595a(18) =1653a(19) =1719a(20) =2047a(21) =2233a(22) =2241a(23) =2569a(24) =2727a(25) =2829a(26) =3237a(27) =3269a(28) =3999a(29) =4585