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

Terms

a(0) =52a(1) =58a(2) =63a(3) =70a(4) =76a(5) =84a(6) =87a(7) =91a(8) =93a(9) =97a(10) =98a(11) =105a(12) =119a(13) =123a(14) =139a(15) =140a(16) =141a(17) =142a(18) =146a(19) =155a(20) =158a(21) =185a(22) =197a(23) =206a(24) =208a(25) =221a(26) =232a(27) =233a(28) =269a(29) =280