A Kutz sequence.

Terms

a(0) =1a(1) =4a(2) =1a(3) =4a(4) =9a(5) =4a(6) =9a(7) =16a(8) =9a(9) =16a(10) =25a(11) =16a(12) =25a(13) =36a(14) =25a(15) =36a(16) =49a(17) =36a(18) =49a(19) =64a(20) =49a(21) =64a(22) =81a(23) =64a(24) =81a(25) =100a(26) =81a(27) =100a(28) =121a(29) =100