a(0)=1; a(1)=1; a(n)= a(n-1) + floor(sqrt(a(n-1)*a(n-2))) + floor(sqrt(a(n-3)*a(n-4))) + ....

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =6a(5) =11a(6) =22a(7) =42a(8) =83a(9) =162a(10) =318a(11) =623a(12) =1224a(13) =2402a(14) =4717a(15) =9261a(16) =18185a(17) =35706a(18) =70111a(19) =137665a(20) =270313a(21) =530772a(22) =1042200a(23) =2046413a(24) =4018242a(25) =7890029a(26) =15492492a(27) =30420327a(28) =59731927a(29) =117286804