a(n) = floor(sqrt(n^7)).

Terms

a(0) =0a(1) =1a(2) =11a(3) =46a(4) =128a(5) =279a(6) =529a(7) =907a(8) =1448a(9) =2187a(10) =3162a(11) =4414a(12) =5985a(13) =7921a(14) =10267a(15) =13071a(16) =16384a(17) =20256a(18) =24743a(19) =29897a(20) =35777a(21) =42439a(22) =49943a(23) =58350a(24) =67723a(25) =78125a(26) =89620a(27) =102275a(28) =116159a(29) =131338