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 A222534 #32 Aug 31 2023 10:03:26 %S A222534 7592506760633776533,36293948155,157957457,603713,422590909,78557, %T A222534 6134663,1259779,575041,7892569,2931991,4095859,2541601,7892569, %U A222534 29169451,271577,35193889,12824269,603713,9454157,575041,7696009,5455789,41561687,7400371,2191531,29046541,2931991 %N A222534 Smallest Sierpinski number that is divisible by the n-th prime. %C A222534 For an odd prime p and odd k, if p divides k, then p does not divide k*2^n + 1 for any n. %H A222534 Arkadiusz Wesolowski, <a href="/A222534/b222534.txt">Table of n, a(n) for n = 2..1000</a> %H A222534 Chris Caldwell, <a href="https://t5k.org/glossary/xpage/SierpinskiNumber.html">The Prime Glossary: Sierpinski number</a> %H A222534 Carlos Rivera, <a href="https://primepuzzles.net/problems/prob_086.htm">Problem 86. A smaller Sierpinski integer divided by 3</a>, The Prime Puzzles & Problems Connection. %e A222534 603713 is first Sierpinski number that is divisible by 11, the 5th prime - so a(5) = 603713. %Y A222534 Cf. A076336, A187716, A213529, A364413. %K A222534 nonn %O A222534 2,1 %A A222534 _Arkadiusz Wesolowski_, Feb 24 2013 %E A222534 Offset changed and initial term added by _Arkadiusz Wesolowski_, May 11 2017 %E A222534 a(2) corrected by _Arkadiusz Wesolowski_, Jul 27 2023