OFFSET
1,1
FORMULA
Equals 8*A101464.
EXAMPLE
6.122934917841436347655359744486...
MATHEMATICA
f[R_, s_] := 2*R*s*Sin[Pi/s]; a[n_] := RealDigits[f[1, 8], 10, n][[1]]; a[109] (* Robert P. P. McKone, Aug 24 2023 *)
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
R. J. Mathar, Aug 24 2023
STATUS
approved