OFFSET
0,4
REFERENCES
Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, Section 5.18 Percolation Cluster Density Constants, p. 373.
FORMULA
35/4 - 3/p_c, where p_c = A130880 = 2*sin(Pi/18) is the critical probability.
EXAMPLE
0.11184427528454969567534433605161118038275119441321220145828...
MATHEMATICA
RealDigits[35/4 - 3/(2*Sin[Pi/18]), 10, 104] // First
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Jean-François Alcover, Jul 30 2014
STATUS
approved