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 A260558 #20 Jul 01 2025 21:39:46 %S A260558 7,15,25,62,119,123,154,245,285,294,295,357,371,476,626,664,690,708, %T A260558 723,737,768,783,803,825,826,835,841,842,867,871,897,904,934,953,1066, %U A260558 1069,1088,1097,1108,1183,1197,1202,1259,1302,1364,1461,1497,1528,1559,1638 %N A260558 Numbers k such that (k^29+1)/(k+1) is prime. %H A260558 Tim Johannes Ohrtmann, <a href="/A260558/b260558.txt">Table of n, a(n) for n = 1..10000</a> %t A260558 Select[Range[1, 10000], PrimeQ[(#^29 + 1)/(# + 1)] &] %o A260558 (PARI) for(n=1,10000, if(isprime((n^29+1)/(n+1)), print1(n,", "))) %o A260558 (Magma) [n: n in [1..10000] |IsPrime((n^29 + 1) div (n + 1))]; %Y A260558 Cf. A055494, A246392, A250174, A250178, A250181, A250185, A250187, A250193, A260559-A260573. %K A260558 nonn %O A260558 1,1 %A A260558 _Tim Johannes Ohrtmann_, Jul 29 2015