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 A347307 #25 Sep 06 2021 15:45:19 %S A347307 1,4,10,22,46,94,118,166,334,358,718,1438,2878,5758,8158,8254,9838, %T A347307 19678,22558,43198,56638,103198,169438,184798,190558,193918,274558, %U A347307 315358,318238,357598,419038,439678,486238,698398,858238,1716478,1723198,1965118,2029438,4058878 %N A347307 Records in A347113. %H A347307 Chai Wah Wu, <a href="/A347307/b347307.txt">Table of n, a(n) for n = 1..54</a> %o A347307 (Python) %o A347307 from math import gcd %o A347307 A347307_list, nset, m, c, j = [1], {1}, 2, 0, 2 %o A347307 for _ in range(10**4): %o A347307 k = m %o A347307 while k == j or gcd(k,j) == 1 or k in nset: %o A347307 k += 1 %o A347307 if k > c: %o A347307 c = k %o A347307 A347307_list.append(k) %o A347307 j = k + 1 %o A347307 nset.add(k) %o A347307 while m in nset: %o A347307 m += 1 # _Chai Wah Wu_, Sep 01 2021 %Y A347307 Cf. A347113, A347306, A347308. %K A347307 nonn %O A347307 1,2 %A A347307 _N. J. A. Sloane_, Sep 01 2021 %E A347307 a(23)-a(40) from _Alois P. Heinz_, Sep 01 2021