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

Terms

a(0) =28a(1) =31a(2) =34a(3) =36a(4) =37a(5) =39a(6) =42a(7) =43a(8) =45a(9) =47a(10) =49a(11) =50a(12) =52a(13) =54a(14) =55a(15) =57a(16) =58a(17) =60a(18) =61a(19) =63a(20) =66a(21) =67a(22) =68a(23) =69a(24) =70a(25) =71a(26) =73a(27) =74a(28) =75a(29) =76