n written in fractional base 5/2.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =20a(6) =21a(7) =22a(8) =23a(9) =24a(10) =40a(11) =41a(12) =42a(13) =43a(14) =44a(15) =210a(16) =211a(17) =212a(18) =213a(19) =214a(20) =230a(21) =231a(22) =232a(23) =233a(24) =234a(25) =400a(26) =401a(27) =402a(28) =403a(29) =404