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 A256366 #18 Aug 01 2019 09:30:38 %S A256366 2,3,2,3,5,3,5,2,5,2,3,7,3,7,2,5,11,5,11,2,3,13,17,13,17,3,2,19,2,19, %T A256366 2,5,2,5,2,5,2,5,23,3,23,2,23,29,3,29,2,7,2,7,2,3,2,3,31,3,31,2,31,2, %U A256366 3,2,11,2 %N A256366 Primes arising in A=A256189 as gcd(A(n-2), A(n)), n > 3. %C A256366 Conjecture: the sequence contains all primes such that the first appearances of them are in the natural order. %C A256366 Provided all primes appear, they must appear in the natural order. Suppose otherwise: For A=A256189 and some n and primes p < q, q divides a = A(n) but not A(k) for k < n and p does not divide A(k) for k <= n. But then A(n) should be pa/q. - _Danny Rorabaugh_, Mar 31 2015 %H A256366 Peter J. C. Moses, <a href="/A256366/b256366.txt">Table of n, a(n) for n = 2..1001</a> %Y A256366 Cf. A256189. %K A256366 nonn %O A256366 2,1 %A A256366 _Vladimir Shevelev_, Mar 26 2015