%I #10 May 24 2023 03:59:26
%S 1,4,5,7,8,0,4,5,2,0,1,5,4,0,9,3,9,0,0,6,9,1,9,2,2,2,8,2,3,4,1,9,7,4,
%T 5,9,4,3,2,0,3,3,0,7,6,9,9,2,9,1,8,6,3,5,1,3,0,5,0,0,7,8,4,5,5,5,8,7,
%U 3,8,1,8,4,3,9,2
%N Decimal expansion of G/(2*Pi), where G is Catalan's constant A006752.
%C Per-site entropy of the dimer model on a square grid.
%D Miklos Bona, editor, Handbook of Enumerative Combinatorics, CRC Press, 2015, page 554.
%e 0.1457804520154093900691922282341974594320330769929186351305007845558738184...
%t RealDigits[Catalan/(2*Pi), 10, 120][[1]] (* _Amiram Eldar_, May 24 2023 *)
%Y Cf. A006752, A019692.
%K nonn,cons
%O 0,2
%A _N. J. A. Sloane_, Dec 28 2018