Numbers that are the sum of 4 nonzero squares in exactly 2 ways.

Terms

a(0) =31a(1) =34a(2) =36a(3) =37a(4) =39a(5) =43a(6) =45a(7) =47a(8) =49a(9) =50a(10) =54a(11) =57a(12) =61a(13) =68a(14) =69a(15) =71a(16) =74a(17) =77a(18) =81a(19) =83a(20) =86a(21) =94a(22) =107a(23) =113a(24) =116a(25) =131a(26) =136a(27) =144a(28) =149a(29) =200