Smallest number that is sum of squares of distinct earlier terms.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =5a(5) =6a(6) =16a(7) =17a(8) =18a(9) =20a(10) =21a(11) =22a(12) =25a(13) =26a(14) =27a(15) =29a(16) =30a(17) =31a(18) =36a(19) =37a(20) =38a(21) =40a(22) =41a(23) =42a(24) =43a(25) =45a(26) =46a(27) =47a(28) =52a(29) =53