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 A329064 #8 Nov 27 2024 12:12:42
%S A329064 1,2,7,4,9,8,1,5,1,5,5,8,1,1,4,2,0,9,9,3,4,9,4,8,9,6,6,8,1,7,3,7,7,4,
%T A329064 1,9,8,1,0,9,4,0,8,0,6,5,6,7,8,0,1,0,9,2,8,2,5,9,4,8,5,9,8,8,9,7,4,6,
%U A329064 7,7,5,9,0,3,7,0,5,8,1,7,3,0,3,7,5,2,2,3,2,7,4
%N A329064 Decimal expansion of Sum_{n>=1} 1/(3^n-2^n).
%e A329064 1.2749815155811420993...
%t A329064 RealDigits[Total[Table[1/(3^n-2^n),{n,200}]],10,100][[1]] (* _Harvey P. Dale_, Nov 27 2024 *)
%o A329064 (PARI) default(realprecision, 100); suminf(n=1, 1/(3^n-2^n))
%Y A329064 Cf. A065442 (Sum_{n>=1} 1/(2^n-1)), A214369 (Sum_{n>=1} 1/(3^n-1)).
%Y A329064 Cf. A001047 (3^n-2^n).
%K A329064 nonn,cons
%O A329064 1,2
%A A329064 _Jianing Song_, Nov 03 2019