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 A244389 #9 Sep 08 2022 08:46:08 %S A244389 110,130,214,258,282,392,474,522,546,676,734,856,1096,1116,1186,1192, %T A244389 1376,1446,1540,1552,1558,1804,2032,2100,2154,2474,2614,2848,3092, %U A244389 4550,4932,5000,5354,5554,5604,5878,5996,6136,6410,6648 %N A244389 Numbers k such that 1 + k + k^3 + k^5 + k^7 + k^9 + ... + k^53 is prime. %H A244389 Vincenzo Librandi, <a href="/A244389/b244389.txt">Table of n, a(n) for n = 1..430</a> %t A244389 Select[Range[10000], PrimeQ[Total[#^Range[1, 53, 2]] + 1]&] %o A244389 (Magma) [n: n in [0..7000] | IsPrime(s) where s is 1+&+[n^i: i in [1..53 by 2]]]; %Y A244389 Cf. similar sequences listed in A244376. %K A244389 nonn,easy %O A244389 1,1 %A A244389 _Vincenzo Librandi_, Jun 27 2014