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 A230811 #7 Oct 30 2013 21:58:09 %S A230811 3,3,3,1640293473202755797 %N A230811 Smallest starting number for n consecutive odd numbers that are primes or strong pseudoprime (base 2). %C A230811 It is conjectured that there can be at most one more term, a(5). %e A230811 First and smallest occurrence of n, n >= 1, consecutive odd numbers that are primes or strong pseudoprime (base 2): %e A230811 a(1) = 3: (3) ; %e A230811 a(2) = 3: (3, 5) ; %e A230811 a(3) = 3: (3, 5, 7); %e A230811 a(4) = 1640293473202755797: (1640293473202755797, 1640293473202755799, 1640293473202755801, 1640293473202755803); (1640293473202755801 is strong pseudoprime base 2 and others are prime); %Y A230811 Cf. A001567, A001262, A230667, A230810. %K A230811 nonn,hard,fini %O A230811 1,1 %A A230811 _Shyam Sunder Gupta_, Oct 30 2013