A245772 Decimal expansion of the entropy of folding of the triangular lattice.

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

Offset

0,2

References

Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 5.24 Lieb's square ice constant, p. 415.

Links

Table of n, a(n) for n=0..103.

Eric Weisstein's MathWorld, Baxter's Four-Coloring Constant.

Formula

(1/2)*log(A224273).

Example

0.1895600483163599659177242011169696602042850762146366815851796...

Mathematica

RealDigits[(1/2)*Log[(3*Gamma[1/3]^3)/(4*Pi^2)], 10, 104] // First

Crossrefs

Cf. A224273.

Sequence in context: A201294 A199383 A199460 * A190289 A198119 A088612

Adjacent sequences: A245769 A245770 A245771 * A245773 A245774 A245775

Keyword

nonn,cons

Author

Jean-François Alcover, Aug 01 2014

Status

approved