

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
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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 * A331270 A117657 A309083
Adjacent sequences: A057943 A057944 A057945 * A057947 A057948 A057949


KEYWORD

base,dumb,easy,nonn


AUTHOR

Henry Bottomley, Oct 13 2000


STATUS

approved



