This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A230642 #10 Nov 01 2013 14:11:40 %S A230642 1,0,1,0,2,0,1,0,2,0,2,0,2,0,2,0,1,0,2,0,2,0,2,0,2,0,1,0,3,0,2,0,3,0, %T A230642 1,0,2,0,2,0,2,0,2,0,1,0,2,0,2,0,2,0,2,0,1,0,3,0,2,0,3,0,1,0,2,0,2,0, %U A230642 2,0,2,0,1,0,2,0,2,0,2,0,2,0,2,0,3,0,3,0,2,0,2,0,2,0,2,0,2,0,1,0,2,0,2 %N A230642 Number of integers m such that m + (sum of digits in base-3 representation of m) = n. %C A230642 The usual convention in the OEIS is to omit the zero terms when every second term is zero. An exception was made in this case in order to preserve the parallels with A228085 and A230632. See also A230663. %C A230642 a(n) is the number of times n occurs in A230641. %H A230642 Donovan Johnson, <a href="/A230642/b230642.txt">Table of n, a(n) for n = 0..10000</a> %H A230642 <a href="/index/Coi#Colombian">Index entries for Colombian or self numbers and related sequences</a> %Y A230642 Cf. A230632, A228085, A230643, A230641. %Y A230642 Related base-3 sequences: A053735, A134451, A230641, A230642, A230643, A230853, A230854, A230855, A230856, A230639, A230640, A010063 (trajectory of 1) %K A230642 nonn,base %O A230642 0,5 %A A230642 _N. J. A. Sloane_, Oct 31 2013