A011273 Decimal expansion of 19th root of 9.

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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Links

• Ivan Panchenko, Table of n, a(n) for n = 1..1000
• Index entries for algebraic numbers, degree 19.

Programs

Mathematica

RealDigits[Surd[9,19],10,120][[1]] (* Harvey P. Dale, Aug 05 2024 *)

Python

from sympy import integer_nthroot
def A011273(n): return integer_nthroot(9*10**(19*(n-1)),19)[0] % 10 # Chai Wah Wu, Mar 07 2022

Extensions

Last digit corrected by Ivan Panchenko, Sep 04 2014