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 A102737 #35 May 03 2024 07:45:53 %S A102737 1,4,7,11,14,16,22,29,36,40,65,139,149,204,842,1031,1331,1345,1505, %T A102737 1894,3386,3526,11092,23836,37836,138811,182614 %N A102737 Numbers k such that 3*10^k - 11 is prime. %C A102737 Some of the larger entries may only correspond to probable primes. %C A102737 Numbers corresponding to terms <= 842 are certified primes. - _Klaus Brockhaus_, Feb 16 2005 %C A102737 Next term > 12500. - _Ryan Propper_, Jul 21 2006 %C A102737 For k > 1, numbers k such that the digit 2 followed by k-2 occurrences of the digit 9 followed by the digits 89 is prime. - _Robert Price_, Nov 25 2017 %C A102737 a(28) > 2*10^5. - _Robert Price_, Jul 04 2018 %H A102737 Makoto Kamada, <a href="https://stdkmd.net/nrr">Factorization of near-repdigit-related numbers</a>. %H A102737 Makoto Kamada, <a href="https://stdkmd.net/nrr/prime/prime_difficulty.txt">Search for 29w89</a>. %t A102737 Select[Range[1,500],PrimeQ[3*10^# - 11]&] (* _Julien Kluge_, Sep 19 2016 *) %o A102737 (PARI) is(n)=ispseudoprime(3*10^n - 11) \\ _Charles R Greathouse IV_, Jun 13 2017 %K A102737 more,nonn %O A102737 1,2 %A A102737 Tom Mueller (muel4503(AT)uni-trier.de), Feb 08 2005 %E A102737 a(15)-a(19) from _Klaus Brockhaus_, Feb 16 2005 %E A102737 a(20)-a(23) from _Ryan Propper_, Jul 21 2006 %E A102737 a(24)-a(25) from _Robert Price_, Nov 25 2017 %E A102737 a(26) from _Robert Price_, Jul 04 2018 %E A102737 a(27) from _Robert Price_, Jul 25 2018