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 A217019 #17 Nov 27 2020 04:50:39 %S A217019 2,6,8,23,16,34,24,50,89,36,115,80,49,101,149,190,58,202,140,79,231, %T A217019 159,270,371,193,103,216,113,212,804,260,391,151,667,148,431,472,318, %U A217019 486,507,153,870,169,365,185,1145,1214,405,207,434,614,218,1135,703,721 %N A217019 First differences of A128301. %C A217019 The sequence is of chaotic behavior and unbound. Exactly as in A050216 (see comment by T. D. Noe over there), the lines in the graph correspond to prime gaps of 2, 4, 6,... %H A217019 Zak Seidov, <a href="/A217019/b217019.txt">Table of n, a(n) for n = 1..10000</a> %F A217019 a(n) = A165144(n) + 1. - _Flávio V. Fernandes_, Nov 19 2020 %Y A217019 Cf. A000879, A050216, A128301, A165144. %Y A217019 Cf. A001248 (primes squared), A001358 (semiprimes). %K A217019 nonn %O A217019 1,1 %A A217019 _Zak Seidov_, Sep 24 2012