Floor(1/{(8+n^4)^(1/4)}), where {}=fractional part.

Terms

a(0) =1a(1) =4a(2) =13a(3) =32a(4) =62a(5) =108a(6) =171a(7) =256a(8) =364a(9) =500a(10) =665a(11) =864a(12) =1098a(13) =1372a(14) =1687a(15) =2048a(16) =2456a(17) =2916a(18) =3429a(19) =4000a(20) =4630a(21) =5324a(22) =6083a(23) =6912a(24) =7812a(25) =8788a(26) =9841a(27) =10976a(28) =12194a(29) =13500