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 A336765 #28 Nov 20 2020 21:29:48
%S A336765 1,1,3,1,3,3,8,2,9,6,6,0,0,6,2,6,3,7,1,5,0,8,8,5,2,7,8,6,9,2,8,3,4,9,
%T A336765 5,1,3,0,6,8,1,0,6,9,5,0,9,0,2,5,8,3,9,8,8,2,1,7,1,9,5,2,5,6,0,2,7,0,
%U A336765 9,8,6,8,8,3,0,9,2,6,5,6,8,7,9,6,0,2,9,1,8,3,6,8,6,8,9,5,5,5,8,2,5,7,5,7,7
%N A336765 Decimal expansion of Sum_{n>=1} 1/(n!*n^n).
%F A336765 Equals Sum_{n>=1} 1/A061711(n).
%e A336765 1.13133829660062637150885278692834951306810695090...
%p A336765 evalf(sum(1/(n!*n^n), n=1..infinity), 106); # _Alois P. Heinz_, Nov 20 2020
%t A336765 RealDigits[N[Sum[1/(n!*n^n), {n, 1, Infinity}], 800]]
%o A336765 (PARI) suminf(n=1, 1/(n!*n^n)) \\ _Michel Marcus_, Aug 20 2020
%Y A336765 Cf. A061711, A073009, A094082.
%K A336765 nonn,cons
%O A336765 1,3
%A A336765 _Mario Cortés_, Aug 03 2020
%E A336765 Missing first digit inserted by _Alois P. Heinz_, Nov 20 2020