A055949 - OEIS

A055949

n - reversal of base 4 digits of n (written in base 10).

0, 0, 0, 0, 3, 0, -3, -6, 6, 3, 0, -3, 9, 6, 3, 0, 15, 0, -15, -30, 15, 0, -15, -30, 15, 0, -15, -30, 15, 0, -15, -30, 30, 15, 0, -15, 30, 15, 0, -15, 30, 15, 0, -15, 30, 15, 0, -15, 45, 30, 15, 0, 45, 30, 15, 0, 45, 30, 15, 0, 45, 30, 15, 0, 63, 0, -63, -126, 51, -12, -75, -138, 39, -24, -87, -150, 27, -36, -99, -162, 75, 12, -51

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,5

COMMENTS

a(n) is a multiple of 3.

LINKS

Indranil Ghosh, Table of n, a(n) for n = 0..20000

FORMULA

a(n) = n - A030103(n).

EXAMPLE

For n = 6, the reversal of base 4 digits of n (written in base 10) is 9. So, a(6) = 6 - 9 = -3. - Indranil Ghosh, Feb 01 2017

MATHEMATICA