A322757 Decimal expansion of G/(2*Pi), where G is Catalan's constant A006752.

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, 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, 3, 8, 1, 8, 4, 3, 9, 2

Offset: 0

Author

N. J. A. Sloane, Dec 28 2018

Keywords

• nonn
• cons

Comments

Per-site entropy of the dimer model on a square grid.

Examples

			0.1457804520154093900691922282341974594320330769929186351305007845558738184...
		

References

• Miklos Bona, editor, Handbook of Enumerative Combinatorics, CRC Press, 2015, page 554.

Crossrefs

Cf. A006752, A019692, A143233.

Programs

Mathematica

RealDigits[Catalan/(2*Pi), 10, 120][[1]] (* Amiram Eldar, May 24 2023 *)

Formula

Equals (1/2) * A143233. - Peter Bala, Aug 01 2025