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 A138662 #2 Mar 30 2012 17:27:55 %S A138662 1,3,3,469,1333,15984,978131,978131 %N A138662 First term of the first run of at least n consecutive numbers in A137292. %e A138662 First few terms of A137292 are 1,3,4,5,7,9,10,13,... . The first run of at least two consecutive numbers is 3,4; the first run of at least three consecutive numbers is 3,4,5. Hence a(2) = a(3) = 3. %Y A138662 Cf. A137292. %K A138662 nonn,base %O A138662 1,2 %A A138662 _Klaus Brockhaus_, Mar 25 2008