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Decimal expansion of Sum_{n>=1} 1/(3^n-2^n).
1

%I #6 Nov 03 2019 14:51:26

%S 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 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 7,7,5,9,0,3,7,0,5,8,1,7,3,0,3,7,5,2,2,3,2,7,4

%N Decimal expansion of Sum_{n>=1} 1/(3^n-2^n).

%e 1.2749815155811420993...

%o (PARI) default(realprecision, 100); suminf(n=1, 1/(3^n-2^n))

%Y Cf. A065442 (Sum_{n>=1} 1/(2^n-1)), A214369 (Sum_{n>=1} 1/(3^n-1)).

%Y Cf. A001047 (3^n-2^n).

%K nonn,cons

%O 1,2

%A _Jianing Song_, Nov 03 2019