OFFSET
1,3
COMMENTS
This is the edge length of the {5,4} pentagonal tiling of the hyperbolic plane of curvature -1. This is also the edge length of both the (3,3,3,3,4,4) uniform tiling and the (3,3,3,4,3,4) uniform tiling of the hyperbolic plane of curvature -1.
LINKS
EXAMPLE
1.06127506190503565203301891621357348580678549893863...
MATHEMATICA
RealDigits[ArcCosh[GoldenRatio], 10, 100][[1]] (* Amiram Eldar, Aug 23 2021 *)
PROG
(PARI) acosh((1+sqrt(5))/2) \\ Michel Marcus, Aug 23 2021
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Peter Kagey, Aug 22 2021
STATUS
approved