A086648 - OEIS

%I #14 Feb 21 2023 07:56:06

%S 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 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 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 Decimal expansion of the sum n^(-2n) for n=1 through infinity.

%C This number is the sum of the inverses of the terms in the sequence A062206.

%H Alois P. Heinz, <a href="/A086648/b086648.txt">Table of n, a(n) for n = 1..10000</a>

%e 1.063887103762417011746491117660011115727199076891599286634083869667...

%o (PARI) suminf(k=1,1./k^(2*k)) \\ _Franklin T. Adams-Watters_, Mar 23 2010

%Y Cf. A062206, A073009.

%K cons,easy,nonn

%O 1,3

%A Christopher M. Tomaszewski (cmt1288(AT)comcast.net), Jul 26 2003

%E Clarified definition - _R. J. Mathar_, Feb 06 2009

%E More terms from _Franklin T. Adams-Watters_, Mar 23 2010