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 A228003 #29 Jul 16 2015 22:34:01 %S A228003 0,4,11,13,19,31,43,61,73,103,109,139,151,181,193,199,211,223,229,241, %T A228003 271,283,313,349,379,409,421,433,439,463,523,571,601,613,619,631,643, %U A228003 649 %N A228003 Places of records of A227321. %C A228003 Records of A227321 are 3, 4, 5, 8, 11, 17, 23, 32, 38,.... %C A228003 The first 3 nonprimes are a(1)=0, a(2)=4, a(38)=649. %C A228003 The sequence contains all greaters of twin primes more than 7 (see A006512). %H A228003 Peter J. C. Moses, <a href="/A228003/b228003.txt">Table of n, a(n) for n = 1..2000</a> %F A228003 For n>=4, A227321(a(n)) = (a(n) + 3)/2. %Y A228003 Cf. A227321, A006512. %K A228003 nonn %O A228003 1,2 %A A228003 _Vladimir Shevelev_, Aug 07 2013 %E A228003 More terms from _Peter J. C. Moses_, Aug 07 2013