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

Offset: 0

Author

Henry Bottomley, Jul 18 2000

Keywords

• base
• nonn
• look

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!

Crossrefs

Cf. A030103, A056964.

Cf. A035524 (iterated).

Programs

Haskell

a055948 n = n + a030103 n
-- Reinhard Zumkeller, Oct 10 2011

Mathematica

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

Formula

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