A230160 Decimal expansion of the positive real solution of the equation x^k-x-1=0. Case k=7.

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 *)

Crossrefs

Cf. A001622, A060006, A060007, A160155, A230159, A230161-A230163.

Sequence in context: A057105 A016536 A189960 * A063503 A244976 A248675

Adjacent sequences: A230157 A230158 A230159 * A230161 A230162 A230163

Keyword

nonn,cons

Author

Paolo P. Lava, Oct 11 2013

Status

approved