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 A173390 #6 Dec 08 2015 02:00:50 %S A173390 1,3,16,37,40,47,55,56,74,103,108,111,119,130,161,165,185,188,195,200, %T A173390 219,240,272,273,292,340,359,388,420,427,465,466,509,521,554,600,606, %U A173390 622,630,634,668,683,684,703,710,711,734,762,792,814,822,823,830,831 %N A173390 n-th difference between consecutive natural noncomposite numbers = n-th difference between consecutive prime numbers. %C A173390 Numbers n such that A075526(n) = A001223(n). %C A173390 Essentially the same as A066875. - _R. J. Mathar_, Feb 21 2010 %F A173390 A075526(a(n)) = A001223(a(n)). %Y A173390 Cf. A001223, A075526. %K A173390 nonn %O A173390 1,2 %A A173390 _Juri-Stepan Gerasimov_, Feb 17 2010