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 A220446 #7 May 23 2014 11:26:53 %S A220446 19,43,71,79,83,131,163,191,199,211,223,227,263,311,331,347,379,431, %T A220446 463,467,491,499,563,659,727,811,839,863,883,971 %N A220446 Oscillating primes. %C A220446 These are the primes p for the p-adic valuation of A220449 has a well-defined oscillation. %C A220446 See Moll (2012) for precise definition. %H A220446 V. H. Moll, <a href="http://www.tulane.edu/~vhm/papers_html/xn-final.pdf">An arithmetic conjecture on a sequence of arctangent sums</a>, 2012. %Y A220446 Cf. A220449. %K A220446 nonn %O A220446 1,1 %A A220446 _N. J. A. Sloane_, Dec 22 2012