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 A144247 #12 Jul 24 2025 05:50:37 %S A144247 131,1321,214358891,505447028499293761,5559917313492231491, %T A144247 895430243255237372246521, %U A144247 20796505671840591460586660430317517562942313712635618374571,539407797827634189900210968137750826278309533633974732577186113975171 %N A144247 Prime numbers of the form 11^k +- 10. %C A144247 The next term is 18621820132595144528407508578788012958402726053563392593510831217730632927190897881. %C A144247 The next larger term is 11^273 - 10 and there are no further terms for k < 1001. %C A144247 It is conjectured that 131 is the only palindrome in the sequence. %H A144247 Amiram Eldar, <a href="/A144247/b144247.txt">Table of n, a(n) for n = 1..10</a> %Y A144247 Cf. A000040, A000668, A144231, A144232, A144233, A144234, A144236, A144242, A144245, A144246. %K A144247 nonn %O A144247 1,1 %A A144247 _Reikku Kulon_, Sep 15 2008