Numbers that are the sum of 4 but no fewer nonzero squares.

Terms

a(0) =7a(1) =15a(2) =23a(3) =28a(4) =31a(5) =39a(6) =47a(7) =55a(8) =60a(9) =63a(10) =71a(11) =79a(12) =87a(13) =92a(14) =95a(15) =103a(16) =111a(17) =112a(18) =119a(19) =124a(20) =127a(21) =135a(22) =143a(23) =151a(24) =156a(25) =159a(26) =167a(27) =175a(28) =183a(29) =188