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 A137420 #8 Aug 03 2024 11:53:26
%S A137420 0,1,3,1,1,1,1,1,1,2,4,7,2,1,2,1,1,1,2,1,14,1,1,2,4,1,120,1,3,1,4,1,2,
%T A137420 6,1,1,5,1,1,5,2,1,11,2,409,1,1,7,3,2,1,11,142,1,3,1,44,1,1,27,1,3,1,
%U A137420 1,100,1,39,14,2,16,1,1,11,1,2,29,2,1,1,1,3,4,1,1,1,12,1,1,118,7,9,1,1,6
%N A137420 Continued fraction expansion of Sum_{n=1..infinity} (-1)^(n+1)/n^n = Integral_{x=0..1} x^(x) dx.
%H A137420 Wikipedia, <a href="http://en.wikipedia.org/wiki/Sophomore%27s_dream">Sophomore's dream</a>.
%p A137420 sd1 := proc(n) local i, tren; tren := 0: for i from 1 to n do tren := (-1)^(i+1)*(1/i^(i)) + tren: od; RETURN(tren); end: numtheory[cfrac] (sd1(300),150,'quotients');
%Y A137420 Cf. A083648 (decimal expansion).
%K A137420 nonn,cofr
%O A137420 0,3
%A A137420 _Jani Melik_, Apr 16 2008
%E A137420 Offset changed by _Andrew Howroyd_, Aug 03 2024