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 A244323 #10 Aug 06 2015 07:36:11
%S A244323 23,39,99,279,775,1271,3003,26411,45059,53219,96811,180063,538083,
%T A244323 1557987,2994571,5394027,76600323,78603291,646326135,5260930155,
%U A244323 11705029515,55771437087,918661840551,2662267345431,156054629431431,1885162669463151,2739827178329319,23916267980687775,343334160580618935
%N A244323 Iterates of A234742, starting from value a(0) = 23, with a(1) = A234742(a(0)), a(2) = A234742(a(1)), etc.
%C A244323 The sequence reaches its fixed point at a(55) = 3643749709604450870616156947649219, after which the sequence stays constant, a(55) = a(56) = a(57), etc.
%H A244323 Antti Karttunen, <a href="/A244323/b244323.txt">Table of n, a(n) for n = 0..56</a>
%o A244323 (PARI)
%o A244323 A234742(n)=factorback(subst(lift(factor(Mod(1, 2)*Pol(binary(n)))), x, 2))+(n==1)
%o A244323 iterates_of_A234742(start,filename) = {my(n=start,prev=-1,prevprev=-1,i=0); until((n==prevprev), write(filename, i, " ", n); prevprev = prev; prev = n; n = A234742(n); i++)} \\ Computes b-file up to the second occurrence of the fixed point.
%o A244323 iterates_of_A234742(23,"b244323.txt")
%Y A244323 Cf. A234742, A235033, A235035, A260712, A260713, A260716.
%Y A244323 Cf. also A260729, A260735, A260441 (other such iterations).
%K A244323 nonn
%O A244323 0,1
%A A244323 _Antti Karttunen_ and _M. F. Hasler_, Jul 23 2014