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%I #18 Feb 19 2024 01:55:22
%S 1,2,1,4,7,2,5,8,1,4,7,10,13,16,19,22,25,2,5,8,11,14,17,20,23,26,1,4,
%T 7,10,13,16,19,22,25,28,31,34,37,40,43,46,49,52,55,58,61,64,67,70,73,
%U 76,79,2,5,8,11,14,17,20,23,26,29,32,35,38,41,44,47,50,53,56,59,62,65,68
%N Write n in base 3 then rotate left one place.
%C A={a(n)} is self-similar in the sense that the subsequence remaining after deleting the first occurrence of each integer is identical to the original sequence A (Kimberling's "upper-trimming" operation).
%H Indranil Ghosh, <a href="/A048787/b048787.txt">Table of n, a(n) for n = 1..59049</a>
%e a(33)=19 since 33 = 1020(base 3) -> 0201(base 3) = 19.
%t Table[ FromDigits[ RotateLeft[ IntegerDigits[n, 3]], 3], {n, 1, 76}] - _Zerinvary Lajos_, Mar 25 2007
%o (Python)
%o def A048787(n):
%o ....x=A007089(n)
%o ....return int (x[1:]+x[0],3) # _Indranil Ghosh_, Feb 08 2017
%Y Cf. A255588-A255594, A255689-A255693.
%K nonn,base
%O 1,2
%A _John W. Layman_ and Anthony C. Hill (hilla(AT)hotmail.com)
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