A004494 - OEIS

%I #20 Dec 27 2023 08:31:37

%S 5,3,4,8,6,7,2,0,1,14,12,13,17,15,16,11,9,10,23,21,22,26,24,25,20,18,

%T 19,32,30,31,35,33,34,29,27,28,41,39,40,44,42,43,38,36,37,50,48,49,53,

%U 51,52,47,45,46,59,57,58,62,60,61,56,54,55,68,66,67,71,69

%N Tersum n + 5.

%H <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,0,0,0,0,0,1,-1).

%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.

%t LinearRecurrence[{1, 0, 0, 0, 0, 0, 0, 0, 1, -1}, {5, 3, 4, 8, 6, 7,

%t 2, 0, 1, 14}, 80] (* _Jinyuan Wang_, Mar 10 2020 *)

%o (Python) # T(n, m) in A004489

%o def a(n): return T(n, 5)

%o print([a(n) for n in range(68)]) # _Michael S. Branicky_, May 03 2021

%Y Cf. A004489.

%K nonn,easy

%O 0,1

%A _N. J. A. Sloane_