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 A067862 #41 May 20 2021 00:21:40 %S A067862 1,3,6,9,27,54,180,216,225,486 %N A067862 Numbers k that divide the sum of digits of 3^k. %C A067862 No further terms below 200000. - _Sascha Kurz_, Mar 19 2002 %C A067862 No further terms below 1000000 - _Harvey P. Dale_, Dec 01 2010 %C A067862 Almost certainly there are no further terms. %C A067862 All terms greater than 1 are multiples of 3. - _Alonso del Arte_, Oct 08 2013 %C A067862 Numbers k such that A175435(k) = 0. - _Michel Marcus_, Oct 09 2013 %e A067862 6 divides the sum of digits of 3^6 (i.e., 7 + 2 + 9 = 18), so it belongs to the sequence. %t A067862 Select[Range[1000000], Divisible[Total[IntegerDigits[3^#]], #] &] (* _Harvey P. Dale_, Dec 01 2010 *) %Y A067862 Cf. A004166, A175169, A175435. %K A067862 nonn,base %O A067862 1,2 %A A067862 _Shyam Sunder Gupta_ and _Amarnath Murthy_, Feb 16 2002 %E A067862 Checked and found no further terms up to n = 1000000. - _Harvey P. Dale_, Dec 01 2010