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 A179226 #2 Mar 31 2012 14:41:48 %S A179226 1927639,48828,2069,735,664,118,46,36,19,15,11,12,27,169,57,100,279841 %N A179226 Iterative mapping with offset: a(1)=1927639, a(n)=A179216(a(n-1)-1). %C A179226 a(18) is greater than 10^8 and of the form (p^16)qr, where p, q and r are distinct primes. Of the sequences of type a(n) = A179216(a(n-1)-1), this contains the smallest integer (11) that is part of an unknown sequence type (i.e. it is unknown if this sequence continues indefinitely in both directions, is part of a loop, or is part of the sequence A179225.) %H A179226 Will Nicholes, <a href="http://willnicholes.com/math/primesigmap.htm">Iterative mapping of prime signatures</a>. %Y A179226 Cf. A179216, A179225. %K A179226 nonn %O A179226 1,1 %A A179226 _Will Nicholes_, Jul 10 2010