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 A244386 #9 Sep 08 2022 08:46:08 %S A244386 2,88,126,230,300,582,596,612,730,790,886,978,1000,1022,1088,1160, %T A244386 1616,1710,1958,2200,2480,2512,2746,3058,3120,3132,3142,3348,3398, %U A244386 3546,3568,3800,4068,4190,4268,4438,4446,4692,4780,5012,5026,5300,5498,5558,5698,5880 %N A244386 Numbers k such that 1 + k + k^3 + k^5 + k^7 + k^9 + ... + k^41 is prime. %H A244386 Vincenzo Librandi, <a href="/A244386/b244386.txt">Table of n, a(n) for n = 1..600</a> %t A244386 Select[Range[7000], PrimeQ[Total[#^Range[1, 41, 2]] + 1] &] %o A244386 (Magma) [n: n in [0..7000] | IsPrime(s) where s is 1+&+[n^i: i in [1..41 by 2]]]; %Y A244386 Cf. similar sequences listed in A244376. %K A244386 nonn,easy %O A244386 1,1 %A A244386 _Vincenzo Librandi_, Jun 27 2014