A055948 - OEIS

A055948

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

0, 2, 4, 6, 5, 10, 15, 20, 10, 15, 20, 25, 15, 20, 25, 30, 17, 34, 51, 68, 25, 42, 59, 76, 33, 50, 67, 84, 41, 58, 75, 92, 34, 51, 68, 85, 42, 59, 76, 93, 50, 67, 84, 101, 58, 75, 92, 109, 51, 68, 85, 102, 59, 76, 93, 110, 67, 84, 101, 118, 75, 92, 109, 126, 65, 130, 195

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

OFFSET

0,2

COMMENTS

If n has an even number of digits in base 4 then a(n) is a multiple of 5.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Index entries for sequences related to Reverse and Add!

FORMULA

a(n) = n + A030103(n).

MATHEMATICA

Table[n+FromDigits[Reverse[IntegerDigits[n, 4]], 4], {n, 0, 70}] (* Harvey P. Dale, Nov 24 2021 *)