This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A011273 #19 Jul 08 2025 02:07:08 %S A011273 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, %T A011273 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, %U A011273 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 %N A011273 Decimal expansion of 19th root of 9. %H A011273 Ivan Panchenko, <a href="/A011273/b011273.txt">Table of n, a(n) for n = 1..1000</a> %H A011273 <a href="/index/Al#algebraic_19">Index entries for algebraic numbers, degree 19</a>. %t A011273 RealDigits[Surd[9,19],10,120][[1]] (* _Harvey P. Dale_, Aug 05 2024 *) %o A011273 (Python) %o A011273 from sympy import integer_nthroot %o A011273 def A011273(n): return integer_nthroot(9*10**(19*(n-1)),19)[0] % 10 # _Chai Wah Wu_, Mar 07 2022 %K A011273 nonn,cons %O A011273 1,3 %A A011273 _N. J. A. Sloane_ %E A011273 Last digit corrected by _Ivan Panchenko_, Sep 04 2014