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 A108549 #3 Mar 30 2012 18:50:50 %S A108549 1,2,3,4,5,6,7,8,9,10,12,14,15,16,17,18,19,20,21,24,25,27,28,30,32,34, %T A108549 35,36,38,40,41,42,43,45,48,49,50,51,54,56,57,60,63,64,68,70,72,75,76, %U A108549 80,81,82,84,85,86,90,95,96,98,100,102,105,108,112,114,119,120,123,125 %N A108549 Fixed points for A108548. %C A108549 A108548(a(n)) = a(n); multiplicative closure of A108547. %Y A108549 Cf. A108546. %K A108549 nonn %O A108549 1,2 %A A108549 _Reinhard Zumkeller_, Jun 10 2005