OFFSET
1,1
COMMENTS
10's complement of A319740.
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
FORMULA
a(n) = 9 - A319740(n) for n >= 2.
EXAMPLE
9^3 == 9 == -1/11 (mod 10).
69^3 == 9 == -1/11 (mod 100).
869^3 == 909 == -1/11 (mod 1000).
2869^3 == 909 == -1/11 (mod 10000).
...
...020241832869^3 = ...090909090909 = ...999999999999/11 = -1/11.
MAPLE
op([1, 3], padic:-rootp(11*x^3+1, 10, 100)); # Robert Israel, Mar 24 2019
PROG
(PARI) seq(n)={Vecrev(digits(lift(chinese( Mod((-1/11 + O(5^n))^(1/3), 5^n), Mod((-1/11 + O(2^n))^(1/3), 2^n)))), n)} \\ Following Andrew Howroyd's code for A319740.
CROSSREFS
10-adic cube root of p/q:
q=11: this sequence (p=-1), A319740 (p=1);
KEYWORD
nonn,base
AUTHOR
Jianing Song, Feb 23 2019
STATUS
approved