A090141 a(n) = Mod[n,4+Sum[Mod[Floor[n/4^m],4],{m,1,10}]]

1, 2, 3, 4, 0, 1, 2, 2, 3, 4, 5, 5, 6, 0, 1, 1, 2, 3, 4, 2, 3, 4, 5, 3, 4, 5, 6, 4, 5, 6, 7, 2, 3, 4, 5, 1, 2, 3, 4, 0, 1, 2, 3, 8, 0, 1, 2, 6, 0, 1, 2, 4, 5, 6, 7, 2, 3, 4, 5, 0, 1, 2, 3, 4, 0, 1, 2, 2, 3, 4, 5, 2, 3, 4, 5, 4, 5, 6, 7, 2, 3, 4, 5, 0, 1, 2, 3, 0, 1, 2, 3, 2, 3, 4, 5, 5, 6, 0, 1, 4, 5, 6, 7, 5, 6

Offset

1,2

Links

Table of n, a(n) for n=1..105.

Mathematica

f[n_]=4+Sum[Mod[Floor[n/4^m], 4], {m, 1, 10}]
Table[Mod[n, f[n]], {n, 1, 2000}]

Crossrefs

Sequence in context: A122275 A197024 A031235 * A049264 A010874 A330358

Adjacent sequences: A090138 A090139 A090140 * A090142 A090143 A090144

Keyword

nonn,easy,less

Author

Roger L. Bagula, Jan 19 2004

Status

approved