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 A165842 #8 Apr 10 2016 02:31:54 %S A165842 1,21,21,441,21,441,21,9261,441,441,21,9261,21,441,441,194481,21,9261, %T A165842 21,9261,441,441,21,194481,441,441,9261,9261,21,9261,21,4084101,441, %U A165842 441,441,194481,21,441,441,194481,21,9261,21,9261,9261,441,21,4084101,441 %N A165842 Totally multiplicative sequence with a(p) = 21. %H A165842 G. C. Greubel, <a href="/A165842/b165842.txt">Table of n, a(n) for n = 1..10000</a> %F A165842 a(n) = A009965(A001222(n)) = 21^bigomega(n) = 21^A001222(n). %t A165842 21^PrimeOmega[Range[100]] (* _G. C. Greubel_, Apr 09 2016 *) %K A165842 nonn,mult %O A165842 1,2 %A A165842 _Jaroslav Krizek_, Sep 28 2009