Smallest number that is not the sum of squares of distinct earlier terms.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =7a(5) =8a(6) =11a(7) =12a(8) =15a(9) =16a(10) =17a(11) =18a(12) =19a(13) =20a(14) =21a(15) =22a(16) =23a(17) =24a(18) =25a(19) =26a(20) =27a(21) =28a(22) =29a(23) =30a(24) =31a(25) =32a(26) =33a(27) =34a(28) =35a(29) =38