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%I #11 Oct 26 2023 08:31:38
%S 10,11,9,13,14,12,16,17,15,19,20,18,22,23,21,25,26,24,1,2,0,4,5,3,7,8,
%T 6,37,38,36,40,41,39,43,44,42,46,47,45,49,50,48,52,53,51,28,29,27,31,
%U 32,30,34,35,33,64,65,63,67
%N Tersum n + 10.
%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.
%Y Cf. A004482, A004483, A004492, A004493, A004494.
%Y Cf. A004495, A004496, A004497, A004498.
%K nonn
%O 0,1
%A _N. J. A. Sloane_