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 A086648 #14 Feb 21 2023 07:56:06 %S A086648 1,0,6,3,8,8,7,1,0,3,7,6,2,4,1,7,0,1,1,7,4,6,4,9,1,1,1,7,6,6,0,0,1,1, %T A086648 1,1,5,7,2,7,1,9,9,0,7,6,8,9,1,5,9,9,2,8,6,6,3,4,0,8,3,8,6,9,6,6,7,9, %U A086648 4,6,6,5,5,0,7,6,0,6,5,7,3,2,5,5,5,6,2,0,8,9,0,6,9,1,9,8,7,5,1,9,4,0,2,6,6 %N A086648 Decimal expansion of the sum n^(-2n) for n=1 through infinity. %C A086648 This number is the sum of the inverses of the terms in the sequence A062206. %H A086648 Alois P. Heinz, <a href="/A086648/b086648.txt">Table of n, a(n) for n = 1..10000</a> %e A086648 1.063887103762417011746491117660011115727199076891599286634083869667... %o A086648 (PARI) suminf(k=1,1./k^(2*k)) \\ _Franklin T. Adams-Watters_, Mar 23 2010 %Y A086648 Cf. A062206, A073009. %K A086648 cons,easy,nonn %O A086648 1,3 %A A086648 Christopher M. Tomaszewski (cmt1288(AT)comcast.net), Jul 26 2003 %E A086648 Clarified definition - _R. J. Mathar_, Feb 06 2009 %E A086648 More terms from _Franklin T. Adams-Watters_, Mar 23 2010