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

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

Table[n-FromDigits[Reverse[IntegerDigits[n, 4]], 4], {n, 0, 90}] (* Harvey P. Dale, Aug 22 2011 *)

Crossrefs

Cf. A030103, A056965.

Sequence in context: A010599 A226568 A038517 * A165012 A198126 A074694

Adjacent sequences: A055946 A055947 A055948 * A055950 A055951 A055952

Keyword

base,sign

Author

Henry Bottomley, Jul 18 2000

Status

approved