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 A049081 #21 Mar 27 2015 23:21:54 %S A049081 31,1787,8527,19577,27457,42043,72727,96797,112129,137077,173867, %T A049081 239489,250751,285191,352007,401519,443419,464939,490643,527623, %U A049081 683873,718807,755387,839483,864013,985151,1021271,1080923,1159901,1278779 %N A049081 Primes prime(k) for which A049076(k) = 5. %H A049081 Jens Kruse Andersen, <a href="/A049081/b049081.txt">Table of n, a(n) for n = 1..1000</a> %H A049081 N. Fernandez, <a href="http://www.borve.org/primeness/FOP.html">An order of primeness, F(p)</a> %H A049081 N. Fernandez, <a href="/A006450/a006450.html">An order of primeness</a> [cached copy, included with permission of the author] %p A049081 A049081 := proc(n) %p A049081 ithprime(A049080(n)) ; %p A049081 end proc: # _R. J. Mathar_, Jul 07 2012 %t A049081 Nest[ Prime, Select[ Range[44], !PrimeQ[ # ] &], 5] (* _Robert G. Wilson v_, Mar 15 2004 *) %Y A049081 Cf. A049076, A007821, A049078, A049079, A049080, A058322, A058324, A058325, A058326, A058327, A058328, A093046, A006450. %K A049081 nonn,easy %O A049081 1,1 %A A049081 _Neil Fernandez_ %E A049081 More terms from _Robert G. Wilson v_, Dec 12 2000