A055961 a(n) = n - (reversal of base-11 digits of n) (written in base 10).

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 0, -10, -20, -30, -40, -50, -60, -70, -80, -90, 20, 10, 0, -10, -20, -30, -40, -50, -60, -70, -80, 30, 20, 10, 0, -10, -20, -30, -40, -50, -60, -70, 40, 30, 20, 10, 0, -10, -20, -30, -40, -50, -60, 50, 40, 30, 20, 10, 0, -10, -20, -30, -40, -50, 60, 50, 40, 30, 20, 10, 0, -10, -20, -30, -40

Offset: 0

Author

Henry Bottomley, Jul 18 2000

Keywords

• base
• sign
• look

Comments

a(n) is a multiple of 10.

Links

• Robert Israel, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A056960 (base-11 reversal), A056965 (n minus decimal reversal).

Programs

Maple

f:= proc(n) local L,t;
  L:= convert(n,base,11);
  n - add(L[-i]*11^(i-1),i=1..nops(L))
end proc:
map(f, [$0..100]); # Robert Israel, Apr 20 2021

Mathematica

Table[n-FromDigits[Reverse[IntegerDigits[n,11]],11],{n,0,80}] (* Harvey P. Dale, Feb 21 2023 *)

PARI

a(n) = n - fromdigits(Vecrev(digits(n, 11)), 11); \\ Michel Marcus, Apr 22 2021

Formula

a(n) = n - A056960(n).