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 A049090 #47 Jul 19 2021 03:42:56 %S A049090 11,31,127,277,709,1063,1787,2221,3001,4397,5381,7193,8527,9319,10631, %T A049090 12763,15299,15823,19577,21179,22093,24859,27457,30133,33967,37217, %U A049090 38833,40819,42043,43651,52711,55351,57943,60647,66851,68639,72727 %N A049090 Primes for which A049076 >= 4. %C A049090 Union of A049080, A049081, A058322, A058324, etc. - _R. J. Mathar_, Jul 07 2012 %H A049090 Michael De Vlieger, <a href="/A049090/b049090.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from Robert G. Wilson v) %H A049090 R. G. Batchko, <a href="http://arxiv.org/abs/1405.2900">A prime fractal and global quasi-self-similar structure in the distribution of prime-indexed primes</a>, arXiv preprint arXiv:1405.2900 [math.GM], 2014. %H A049090 N. Fernandez, <a href="http://www.borve.org/primeness/FOP.html">An order of primeness, F(p)</a> %H A049090 N. Fernandez, <a href="/A006450/a006450.html">An order of primeness</a> [cached copy, included with permission of the author] %H A049090 N. Fernandez, <a href="http://www.borve.org/primeness/moreterms.html">More terms of this and other sequences related to A049076.</a> %F A049090 a(n) = A006450(A006450(n)). - _James G. Merickel_, Feb 14 2010 %F A049090 a(n) = A000040(A038580(n)). - _R. J. Mathar_, Jul 07 2012 %F A049090 a(n) ~ n (log n)^4. - _Charles R Greathouse IV_, Feb 16 2017 %p A049090 map(ithprime@@3, select(isprime, [$1..157])); # _Peter Luschny_, Feb 17 2014 %t A049090 Nest[ Prime, Range[40], 4] (* _Robert G. Wilson v_, Mar 15 2004 *) %o A049090 (PARI) list(lim)=my(v=List(),q,r,s); forprime(p=2,lim,if(isprime(q++)&&isprime(r++)&&isprime(s++),listput(v,p))); Vec(v) \\ _Charles R Greathouse IV_, Feb 16 2017 %Y A049090 Cf. A000040, A006450, A038580, A049076, A049202, A049203, A057847, A057849, A057850, A057851, A058332, A093047. %K A049090 nonn %O A049090 1,1 %A A049090 _Neil Fernandez_ %E A049090 Name corrected by _Sean A. Irvine_, Jul 18 2021