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 A100275 #18 Sep 11 2024 21:59:30 %S A100275 1,4,16,22,316,393,461,864,1306,2964,8956,10449,11652,13588,23070, %T A100275 48421 %N A100275 Numbers k such that 9*10^k - 11 is prime. %C A100275 Numbers corresponding to terms <= 864 are certified primes. - _Klaus Brockhaus_, Feb 15 2005 %o A100275 (PARI) is(n)=ispseudoprime(9*10^n-11) \\ _Charles R Greathouse IV_, May 22 2017 %Y A100275 Cf. A092767. %K A100275 nonn,more %O A100275 1,2 %A A100275 _R. K. Guy_, Dec 29 2004 %E A100275 More terms from _Patrick De Geest_, Dec 29 2004 %E A100275 a(1) = 1 inserted by _Tom Mueller_, Feb 08 2005 %E A100275 Edited by _R. J. Mathar_, Aug 06 2008 %E A100275 a(14)-a(15) from _Michael S. Branicky_, May 01 2023 %E A100275 a(16) from _Michael S. Branicky_, Sep 11 2024