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 A085793 #17 Sep 16 2024 03:28:24 %S A085793 2,3,4,5,6,7,9,13,17,18,22,23,28,31,48,49,52,80,99,167,201,295,372, %T A085793 381,391,638,653,720,779,887,1047,1454,1647,1719,2405,3234,3257,3542, %U A085793 3623,3765,3796,4337,4490,5228,6507,8544,9990,10000,12478,13479,15487,17115 %N A085793 Numbers k such that (k-1)*binomial(2k,k) + 1 is prime. %C A085793 a(69) > 10^5 - _Robert Price_, Sep 15 2024 %H A085793 Robert Price, <a href="/A085793/b085793.txt">Table of n, a(n) for n = 1..68</a> %H A085793 Ed Pegg Jr, <a href="http://www.mathpuzzle.com/">Binomial Primes</a>. %e A085793 9999 * 20000!/(10000!)^2 + 1 is prime %o A085793 (PARI) is(n)=ispseudoprime((n-1)*binomial(2*n,n)+1) \\ _Charles R Greathouse IV_, May 22 2017 %Y A085793 Cf. A066699, A066726. %K A085793 nonn %O A085793 1,1 %A A085793 _Ed Pegg Jr_, Jul 23 2003 %E A085793 a(53)-a(68) from _Robert Price_, Sep 15 2024