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 A273938 #15 Jun 26 2016 05:38:53 %S A273938 1,4,6,8,13,12,14,18,20,24,31,40,30,32,38,42,44,48,57,54,60,62,68,72, %T A273938 74,80,121,84,90,98,102,104,108,110,114,133,156,128,132,138,140,150, %U A273938 152,158,164,168,183,174,180,182,192,194,198,200,212,224,228,230 %N A273938 Sum of the divisors of the n-th odd prime power. %F A273938 a(n) = A000203(A061345(n-1)). %p A273938 A273938 := proc(n) %p A273938 numtheory[sigma](A061345(n-1)) ; %p A273938 end proc: %Y A273938 Cf. A061345, A086455, A247837. %K A273938 nonn %O A273938 1,2 %A A273938 _R. J. Mathar_, Jun 04 2016