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A230854 Numbers n such that m + (sum of digits in base-3 representation of m) = n has exactly two solutions. 12

%I #13 Aug 17 2019 12:59:13

%S 4,8,10,12,14,18,20,22,24,30,36,38,40,42,46,48,50,52,58,64,66,68,70,

%T 74,76,78,80,82,88,90,92,94,96,100,102,104,106,112,118,120,122,124,

%U 128,130,132,134,140,146,148,150,152,156,158,160,162,164,170,172,174,176,178,182,184,186,188

%N Numbers n such that m + (sum of digits in base-3 representation of m) = n has exactly two solutions.

%H Donovan Johnson, <a href="/A230854/b230854.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Coi#Colombian">Index entries for Colombian or self numbers and related sequences</a>

%t Select[Tally[Table[m+Total[IntegerDigits[m,3]],{m,200}]],#[[2]]==2&][[All,1]] (* _Harvey P. Dale_, Aug 17 2019 *)

%Y Related base-3 sequences: A053735, A134451, A230641, A230642, A230643, A230853, A230854, A230855, A230856, A230639, A230640, A010063 (trajectory of 1)

%K nonn,base

%O 1,1

%A _N. J. A. Sloane_, Oct 31 2013

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Last modified March 19 04:26 EDT 2024. Contains 370952 sequences. (Running on oeis4.)