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 A067342 #25 Nov 18 2017 08:46:23 %S A067342 1,3,4,7,6,3,8,6,4,9,3,10,5,6,6,4,9,12,2,6,5,9,6,6,4,6,4,11,3,9,5,9, %T A067342 12,9,12,10,11,6,11,9,6,15,8,12,15,9,12,7,12,12,9,17,9,3,9,3,8,9,6,15, %U A067342 8,15,5,10,12,9,14,9,15,9,9,15,11,6,7,5,15,15,8,15,4,9,12,8,9,6,3,9,9,9 %N A067342 Sum of decimal digits of sum of divisors of n. %H A067342 Antti Karttunen, <a href="/A067342/b067342.txt">Table of n, a(n) for n = 1..10000</a> %H A067342 <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a> %F A067342 a(n) = A007953(A000203(n)). - _Michel Marcus_, Dec 26 2013 %e A067342 n=100, sigma(100)=217, SumDigit(217)=10, a(100)=10. %t A067342 Array[Total[IntegerDigits[DivisorSigma[1,#]]]&,90] (* _Harvey P. Dale_, Jan 02 2012 *) %o A067342 (PARI) vector(80, n, sumdigits(sigma(n))) \\ _Michel Marcus_, Apr 08 2015 %Y A067342 Cf. A000203, A007953, A077650, A175548. %K A067342 nonn,base %O A067342 1,2 %A A067342 _Labos Elemer_, Jan 16 2002 %E A067342 Offset corrected to 1 by _Michel Marcus_, Dec 26 2013