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A023061 k and 2k are anagrams in base 5 (written in base 5). 1
13, 130, 143, 1300, 1313, 1430, 1443, 13000, 13013, 13130, 13143, 14300, 14313, 14430, 14443, 102342, 103242, 120234, 120324, 130000, 130013, 130130, 130143, 131300, 131313, 131430, 131443, 143000, 143013, 143130, 143143, 144300, 144313 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

From Robert Israel, Aug 08 2018: (Start)

The concatenation of two terms is a term.

If a*10^m + b is a term, where b < (2/9)*10^m, then a*10^k+b is a term for all k > m. (End)

LINKS

Robert Israel, Table of n, a(n) for n = 1..2000

MAPLE

f:= proc(n) local L, M;

   L:= convert(n, base, 5);

   M:= convert(2*n, base, 5);

   if sort(L) = sort(M) then add(L[i]*10^(i-1), i=1..nops(L)) else NULL fi

end proc:

map(f, [$1..10000]); # Robert Israel, Aug 08 2018

CROSSREFS

Sequence in context: A227749 A016162 A155623 * A255495 A121033 A006100

Adjacent sequences:  A023058 A023059 A023060 * A023062 A023063 A023064

KEYWORD

nonn,base

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 9 11:08 EDT 2020. Contains 336323 sequences. (Running on oeis4.)