A309208 - OEIS

%I #20 Aug 05 2019 16:43:11

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

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

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

%N Decimal expansion of (3 tanh (3 tanh (3 tanh (...))))^(-2).

%C This is the decimal expansion of 1/x^2 where x is the constant defined in A309211.

%H W. M. Gosper, <a href="/A309204/a309204.pdf">Material from Bill Gosper's Computers & Math talk, M.I.T., 1989</a>, i+38+1 pages, annotated and scanned, included with the author's permission. (There are many blank pages because about half of the original pages were two-sided, half were one-sided.)

%e .1122528288730582219511299311388265401208...

%Y Cf. A309207, A309211.

%K nonn,cons

%O 0,3

%A _N. J. A. Sloane_, Jul 29 2019

%E More terms from _Daniel Suteu_, Jul 30 2019