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Decimal expansion of Product_{k>=1} 1 / (1 - 1/4^k).
3

%I #5 Apr 08 2024 05:15:51

%S 1,4,5,2,3,5,3,6,4,2,4,4,9,5,9,7,0,1,5,8,3,4,7,1,3,0,2,2,4,8,5,2,7,4,

%T 8,7,3,3,6,1,2,2,7,9,7,8,8,0,7,9,2,6,3,4,9,6,2,5,3,8,2,7,1,8,4,0,3,6,

%U 8,6,3,0,0,7,8,1,9,4,0,3,1,6,1,0,1,4,0,7,2,0,6,0,1,5,3,6,2,1,2,9

%N Decimal expansion of Product_{k>=1} 1 / (1 - 1/4^k).

%F Equals 1 / A100221.

%e 1.4523536424495970158347130224852748733612...

%t RealDigits[1/QPochhammer[1/4, 1/4], 10, 100][[1]]

%Y Cf. A000302, A065446, A100221, A370466, A371748, A371749, A371750.

%K nonn,cons

%O 1,2

%A _Ilya Gutkovskiy_, Apr 05 2024