A380152 - OEIS

%I #4 Jan 13 2025 15:39:34

%S 3,1,4,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,

%T 8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,

%U 8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1,8,1

%N Decimal expansion of 864/275.

%C This approximation of Pi was calculated by Fibonacci studying the 96-gon and published in 1220 in Practica geometriae (see Gullberg).

%D Jan Gullberg, Mathematics from the Birth of Numbers, W. W. Norton & Co., NY & London, 1997, §3.6 The Quest for Pi, p. 91.

%e 3.1418181818181818181818181818181818181818181818...

%t RealDigits[864/275,10,100][[1]]

%Y Cf. A000796, A068028, A380109.

%K nonn,cons,easy

%O 1,1

%A _Stefano Spezia_, Jan 13 2025