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 A244391 #14 Sep 08 2022 08:46:08 %S A244391 100,136,276,288,696,772,810,1036,1128,1602,1678,1806,1956,1962,2212, %T A244391 2220,2500,2610,2670,2718,2796,2818,3066,3366,3598,3936,4198,4360, %U A244391 4452,4782,5340,5998,6126,6202,6210,6990 %N A244391 Numbers k such that 1 + k + k^3 + k^5 + k^7 + k^9 + ... + k^61 is prime. %H A244391 Chai Wah Wu, <a href="/A244391/b244391.txt">Table of n, a(n) for n = 1..1153</a> (n = 1..250 from Vincenzo Librandi) %t A244391 Select[Range[10000], PrimeQ[Total[#^Range[1, 61, 2]] + 1]&] %o A244391 (Magma) [n: n in [0..7000] | IsPrime(s) where s is 1+&+[n^i: i in [1..61 by 2]]]; %Y A244391 Cf. similar sequences listed in A244376. %K A244391 nonn,easy %O A244391 1,1 %A A244391 _Vincenzo Librandi_, Jun 27 2014