a(n) is the smallest m whose square is the sum of n distinct positive squares.

Terms

a(0) =1a(1) =5a(2) =7a(3) =9a(4) =10a(5) =13a(6) =14a(7) =17a(8) =19a(9) =23a(10) =23a(11) =30a(12) =30a(13) =34a(14) =38a(15) =41a(16) =45a(17) =48a(18) =52a(19) =59a(20) =60a(21) =64a(22) =68a(23) =70a(24) =75a(25) =83a(26) =85a(27) =91a(28) =97a(29) =102