A055958 a(n) = n + reversal of base 9 digits of n (written in base 10).

0, 2, 4, 6, 8, 10, 12, 14, 16, 10, 20, 30, 40, 50, 60, 70, 80, 90, 20, 30, 40, 50, 60, 70, 80, 90, 100, 30, 40, 50, 60, 70, 80, 90, 100, 110, 40, 50, 60, 70, 80, 90, 100, 110, 120, 50, 60, 70, 80, 90, 100, 110, 120, 130, 60, 70, 80, 90, 100, 110, 120, 130, 140, 70, 80, 90

Offset: 0

Author

Henry Bottomley, Jul 18 2000

Keywords

• nonn
• base
• look

Comments

If n has an even number of digits in base 9 then a(n) is a multiple of 10.

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A030108, A056964.

Programs

Mathematica

Table[n+FromDigits[Reverse[IntegerDigits[n,9]],9],{n,0,70}] (* Harvey P. Dale, Sep 03 2013 *)

PARI

a(n) = n + fromdigits(Vecrev(digits(n, 9)), 9); \\ Michel Marcus, Sep 27 2018

Formula

a(n) = n + A030108(n).