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A298738
Decimal expansion of (1/2)(1 + sqrt(7 + 2*sqrt(5))).
1
2, 1, 9, 3, 5, 2, 7, 0, 8, 5, 3, 3, 1, 0, 5, 3, 9, 3, 8, 5, 6, 0, 1, 2, 3, 5, 0, 8, 1, 8, 9, 8, 5, 2, 2, 1, 2, 2, 2, 5, 2, 6, 8, 0, 6, 6, 0, 2, 2, 2, 4, 5, 5, 0, 5, 1, 9, 9, 1, 1, 9, 0, 1, 7, 7, 0, 9, 4, 1, 7, 1, 1, 0, 0, 3, 3, 4, 2, 8, 2, 3, 2, 4, 3, 3, 4
OFFSET
1,1
LINKS
EXAMPLE
constant = 2.1935270853310539386... = positive zero of x^2 - x - r^2, where r = golden ratio = (1+ sqrt(5))/2; see A001622.
MATHEMATICA
r = (1/2)*(1 + Sqrt[7 + 2*Sqrt[5]])
RealDigits[N[r, 100], 10][[1]]; (* A298738 *)
CROSSREFS
KEYWORD
nonn,easy,cons
AUTHOR
Clark Kimberling, Feb 13 2018
STATUS
approved