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n + reversal of base 3 digits of n (written in base 10).
3

%I #18 Aug 08 2024 06:39:29

%S 0,2,4,4,8,12,8,12,16,10,20,30,16,26,36,22,32,42,20,30,40,26,36,46,32,

%T 42,52,28,56,84,40,68,96,52,80,108,40,68,96,52,80,108,64,92,120,52,80,

%U 108,64,92,120,76,104,132,56,84,112,68,96,124,80,108,136,68,96,124,80

%N n + reversal of base 3 digits of n (written in base 10).

%C If n has an even number of digits in base 3 then a(n) is a multiple of 4.

%H Seiichi Manyama, <a href="/A055946/b055946.txt">Table of n, a(n) for n = 0..10000</a>

%F a(n) = n + A030102(n).

%p A055946 := proc(n)

%p n+A030102(n) ;

%p end proc: # _R. J. Mathar_, May 28 2016

%t Array[#+FromDigits[Reverse[IntegerDigits[#,3]],3]&,70,0] (* _Harvey P. Dale_, Nov 09 2017 *)

%Y Cf. A030102, A056964.

%K base,nonn

%O 0,2

%A _Henry Bottomley_, Jul 18 2000