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A071770 Tersum n + [n/3] (answer recorded in base 10). 0

%I #8 Jan 19 2022 11:16:35

%S 0,1,2,4,5,3,8,6,7,12,13,14,16,17,15,11,9,10,24,25,26,19,20,18,23,21,

%T 22,9,37,38,40,41,39,44,42,43,48,49,50,52,53,51,47,45,46,33,34,35,28,

%U 29,27,32,30,31,72,73,74,76,77,75,80,78,79,57,58,59,61,62,60,56,54,55,69,70

%N Tersum n + [n/3] (answer recorded in base 10).

%C Some numbers occur more than once, but they are sparse.

%H P. Mathonet, M. Rigo, M. Stipulanti and N. Zénaïdi, <a href="https://arxiv.org/abs/2201.06636">On digital sequences associated with Pascal's triangle</a>, arXiv:2201.06636 [math.NT], 2022.

%F Tersum m + n: write m and n in base 3 and add mod 3 with no carries, e.g. 5 + 8 = "21" + "22" = "10" = 1. See A004482 for references.

%Y Cf. A004482.

%K nonn

%O 0,3

%A _Paul D. Hanna_, Jun 04 2002

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