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 A357145 #16 Sep 30 2022 09:55:17
%S A357145 1,8,8,7,2,4,2,8,7,2,1,3,9,0,0,5,4,9,5,0,5,4,3,4,3,8,2,3,3,3,9,4,6,4,
%T A357145 2,9,2,7,2,1,0,1,8,7,3,4,7,5,8,3,1,7,1,2,9,6,6,4,6,3,8,2,5,4,4,5,0,2,
%U A357145 5,9,4,4,9,5,0,1,0,1,0,0,3,6,2,6,9,2,7,4,0,7,7,0,5,4,3,3,5,6,0,9,6,3,8,2,4,9
%N A357145 Decimal expansion of Sum_{n>=1} 1/A003422(n).
%e A357145 1.887242872139005495...
%o A357145 (PARI) sumpos(m=1, 1/sum(k=0, m-1, k!)) \\ _Michel Marcus_, Sep 15 2022
%o A357145 (PARI) f=t=1.; 1+suminf(m=1, f*=m; t+=f; 1/t) \\ _Charles R Greathouse IV_, Sep 15 2022
%Y A357145 Cf. A001113, A003422.
%K A357145 nonn,cons
%O A357145 1,2
%A A357145 _Hafiz A. Aziz_, Sep 15 2022
%E A357145 More digits from _Alois P. Heinz_, Sep 15 2022