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 A084721 #7 Apr 11 2015 20:03:06 %S A084721 2,5,5,11,11,11,11,17,17,23,23,23,23,29,29,37,37,37,37,37,37,47,47,47, %T A084721 47,53,53,59,59,59,59,67,67,67,67,73,73,79,79,79,79,89,89,89,89,89,89, %U A084721 97,97,101,101,107,107,107,107,113,113,127,127,127,127,127,127,127,127 %N A084721 Primes arising in A083569. %C A084721 More precisely, a(n)=n+A083569(n). The sequence is strictly increasing, by construction/definition of A083569. - _M. F. Hasler_, Apr 11 2015 %Y A084721 Cf. A083569. %K A084721 nonn %O A084721 1,1 %A A084721 _Amarnath Murthy_, Jun 12 2003 %E A084721 More terms from _David Wasserman_, Jan 03 2005