Lieb's square ice constant

Lieb's square ice constant is a mathematical constant used in the field of combinatorics to quantify the number of Eulerian orientations of grid graphs. It was introduced by Elliott H. Lieb in 1967.

Lieb's square ice constant
Representations
Decimal	1.53960071783900203869106341467188…
Algebraic form	${\frac {8{\sqrt {3}}}{9}}$

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