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A230160
Decimal expansion of the positive real solution of the equation x^k-x-1=0. Case k=7.
5
1, 1, 1, 2, 7, 7, 5, 6, 8, 4, 2, 7, 8, 7, 0, 5, 4, 7, 0, 6, 2, 9, 7, 0, 4, 0, 2, 0, 5, 7, 1, 0, 9, 2, 9, 3, 5, 6, 0, 6, 8, 5, 9, 2, 7, 1, 8, 5, 5, 2, 8, 3, 6, 8, 1, 4, 8, 5, 7, 0, 1, 6, 2, 8, 0, 0, 7, 1, 6, 6, 3, 3, 2, 5, 7, 9, 5, 2, 8, 4, 4, 3, 4, 5, 9, 2, 7
OFFSET
1,4
COMMENTS
Also decimal expansion of (1+(1+(1+ ... )^(1/k))^(1/k))^(1/k), with k integer and k<0. Case k=7.
LINKS
Paolo P. Lava, Table of n, a(n) for n = 1..1000 (corrected by Sean A. Irvine)
EXAMPLE
1.1127756842787054706297040205710929356068592718552836814...
MAPLE
with(numtheory); P:=proc(q, h) local a, n; a:=(q+1)^(1/h);
for n from q by -1 to 1 do a:=(1+a)^(1/h); od;
print(evalf(a, 1000)); end: P(1000, 7);
MATHEMATICA
Root[x^7 - x - 1, 1] // RealDigits[#, 10, 100]& // First (* Jean-François Alcover, Feb 18 2014 *)
KEYWORD
nonn,cons
AUTHOR
Paolo P. Lava, Oct 11 2013
STATUS
approved