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 A254670 #10 Feb 08 2015 07:12:07 %S A254670 2,3,5,19,23,67,83,89,97,107,113,149,151,163,167,193,197,199,239,241, %T A254670 283,307,313,317,331,347,349,389,433,439,461,463,467,479,503,509,521, %U A254670 523,557,577,619,661,673,677,701,727,739,751,821,823,827,829,839,853 %N A254670 Terms of A254669 for which A254669(n)=prime(n). %C A254670 Conjecture: the sequence is infinite. %H A254670 Peter J. C. Moses, <a href="/A254670/b254670.txt">Table of n, a(n) for n = 1..1000</a> %H A254670 David L. Applegate, Hans Havermann, Bob Selcoe, Vladimir Shevelev, N. J. A. Sloane, and Reinhard Zumkeller, <a href="http://arxiv.org/abs/1501.01669">The Yellowstone Permutation</a>, arXiv preprint arXiv:1501.01669, 2015. %Y A254670 Cf. A098550, A254669. %K A254670 nonn %O A254670 1,1 %A A254670 _Vladimir Shevelev_, Feb 04 2015 %E A254670 More terms from _Peter J. C. Moses_, Feb 04 2015