Numbers that are the sum of 4 nonzero squares in exactly 3 ways.

Terms

a(0) =28a(1) =42a(2) =55a(3) =60a(4) =66a(5) =67a(6) =73a(7) =75a(8) =78a(9) =79a(10) =85a(11) =92a(12) =95a(13) =99a(14) =109a(15) =110a(16) =112a(17) =121a(18) =125a(19) =129a(20) =134a(21) =137a(22) =161a(23) =164a(24) =168a(25) =173a(26) =179a(27) =209a(28) =240a(29) =264