Largest square less than or equal to sum of previous terms.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =4a(5) =4a(6) =9a(7) =16a(8) =36a(9) =64a(10) =121a(11) =256a(12) =484a(13) =961a(14) =1936a(15) =3844a(16) =7569a(17) =15129a(18) =30276a(19) =60516a(20) =121104a(21) =242064a(22) =483025a(23) =966289a(24) =1932100a(25) =3865156a(26) =7728400a(27) =15452761a(28) =30902481a(29) =61811044