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A057946 Bad hexadecimal notation for n: write n in hexadecimal notation, replacing digit ten with "10", digit eleven with "11", ... and digit fifteen with "15". 4
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 110, 111, 112, 113, 114, 115, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 210, 211, 212, 213, 214, 215, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 310, 311, 312, 313, 314, 315, 40, 41 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..10000

EXAMPLE

a(15)=15 since it is represented by the digit "15" base 16. a(21)=15 since it is represented by the digit "1" followed by the digit "5" base 16.

MAPLE

a:= proc(n) local i, m, r ; m:=n; r:=NULL;

      if n=0 then return 0 fi;

      for i from 0 while m>0 do

        r:= irem(m, 16, 'm'), r

      od; parse(cat(r))

    end:

seq(a(n), n=0..80);  # Alois P. Heinz, Jun 23 2014

MATHEMATICA

f[n_] := FromDigits@ Flatten@ IntegerDigits@ IntegerDigits[n, 16]; Array[f, 66, 0] (* Robert G. Wilson v, Jun 23 2014 *)

CROSSREFS

Cf. A057947 for ambiguous numbers, A055645 for a better representation of hexadecimal.

Sequence in context: A291580 A291581 A058035 * A117657 A309083 A106618

Adjacent sequences:  A057943 A057944 A057945 * A057947 A057948 A057949

KEYWORD

base,dumb,easy,nonn

AUTHOR

Henry Bottomley, Oct 13 2000

STATUS

approved

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Last modified October 18 17:13 EDT 2019. Contains 328186 sequences. (Running on oeis4.)