A225449 Digits of the 10-adic integer (-9)^(1/7).

1, 7, 8, 2, 5, 0, 2, 0, 6, 4, 6, 2, 8, 9, 1, 4, 7, 0, 8, 9, 4, 4, 3, 5, 3, 9, 4, 9, 6, 3, 5, 2, 5, 7, 2, 3, 9, 4, 9, 4, 8, 8, 1, 0, 0, 4, 8, 4, 1, 4, 8, 5, 4, 9, 9, 2, 2, 7, 1, 9, 2, 2, 2, 5, 1, 6, 3, 7, 2, 2, 0, 0, 8, 9, 5, 2, 9, 0, 9, 6, 9, 4, 8, 8, 8, 2, 4, 3, 6, 6, 7, 9, 8, 8, 2, 0, 4, 3, 9, 0

Offset

0,2

Comments

This is the 10's complement of A225446.

Links

Seiichi Manyama, Table of n, a(n) for n = 0..10000

Example

      1^7 == -9 (mod 10).
     71^7 == -9 (mod 10^2).
    871^7 == -9 (mod 10^3).
   2871^7 == -9 (mod 10^4).
  52871^7 == -9 (mod 10^5).
  52871^7 == -9 (mod 10^6).

Prog

(PARI) n=0; for(i=1, 100, m=(10^i-9); for(x=0, 9, if(((n+(x*10^(i-1)))^7)%(10^i)==m, n=n+(x*10^(i-1)); print1(x", "); break)))
(PARI) Vecrev(digits(truncate((-9+O(10^100))^(1/7)))) \\ Seiichi Manyama, Aug 04 2019
(PARI) N=100; Vecrev(digits(lift(chinese(Mod((-9+O(2^N))^(1/7), 2^N), Mod((-9+O(5^N))^(1/7), 5^N)))), N) \\ Seiichi Manyama, Aug 04 2019

Crossrefs

Digits of 10-adic integers:

A225443 ((-1/9)^(1/7));

A225446 ( 9^(1/7));

A225452 ( (1/9)^(1/7)).

Sequence in context: A196610 A198938 A244067 * A345412 A021565 A343617

Adjacent sequences: A225446 A225447 A225448 * A225450 A225451 A225452

Keyword

nonn,base

Author

Aswini Vaidyanathan, May 11 2013

Status

approved