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 A011440 #14 Jul 08 2025 02:17:52 %S A011440 1,1,5,6,0,1,3,2,8,1,0,0,0,8,0,3,2,7,2,6,9,5,3,9,7,0,8,0,8,9,5,1,0,7, %T A011440 1,3,2,1,4,1,3,1,3,6,5,6,8,7,6,6,7,6,8,5,4,9,4,1,8,1,6,1,7,9,4,0,0,7, %U A011440 6,3,0,6,7,6,6,0,9,0,8,9,5,6,1,0,4,5,3,4,4,6,1,1,1,9,8,7,6,6,9 %N A011440 Decimal expansion of 21st root of 21. %H A011440 Ivan Panchenko, <a href="/A011440/b011440.txt">Table of n, a(n) for n = 1..1000</a> %H A011440 <a href="/index/Ro#roots">Sequences related to the decimal expansion of the n-th root of x</a>, OEIS Index, Aug. 2017 %t A011440 RealDigits[Surd[21,21],10,120][[1]] (* _Harvey P. Dale_, Mar 14 2013 *) %o A011440 (PARI) sqrtn(21,21) \\ _M. F. Hasler_, Aug 26 2017 %Y A011440 Cf. A011200 ... A011439 (n-th root of x = 5..20, with n = 6..20), A011441 ... A011519 (n-th root of n = 22, ..., 100). %K A011440 nonn,cons %O A011440 1,3 %A A011440 _N. J. A. Sloane_