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 A008571 #23 Aug 26 2025 15:04:01 %S A008571 1,1,1,1,2,1,1,3,3,1,1,4,6,4,1,1,6,1,0,5,1,1,7,7,1,5,6,1,1,9,4,8,7,1, %T A008571 7,1,2,1,4,3,5,8,8,8,1,2,3,5,7,9,4,7,6,9,1,2,5,9,3,7,4,2,4,6,0,1,2,8, %U A008571 5,3,1,1,6,7,0,6,1,1,3,1,3,8,4,2,8,3,7,6,7,2,1,3,4,5,2,2,7,1,2 %N A008571 Digits of powers of 11. %C A008571 The constant whose decimal expansion is this sequence is irrational (Mahler, 1981). - _Amiram Eldar_, Mar 23 2025 %H A008571 Seiichi Manyama, <a href="/A008571/b008571.txt">Rows n = 0..100, flattened</a> %H A008571 Kurt Mahler, <a href="https://doi.org/10.1016/0022-314X(81)90010-X">On some irrational decimal fractions</a>, Journal of Number Theory, Vol. 13, No. 2 (1981), pp. 268-269. %e A008571 Triangle begins: %e A008571 1; %e A008571 1, 1; %e A008571 1, 2, 1; %e A008571 1, 3, 3, 1; %e A008571 1, 4, 6, 4, 1; %e A008571 1, 6, 1, 0, 5, 1; %e A008571 1, 7, 7, 1, 5, 6, 1; %e A008571 1, 9, 4, 8, 7, 1, 7, 1; %e A008571 2, 1, 4, 3, 5, 8, 8, 8, 1; %e A008571 ... %t A008571 IntegerDigits[11^Range[0,20]]//Flatten (* _Harvey P. Dale_, Aug 26 2025 *) %Y A008571 Cf. A001020, A348553. %Y A008571 Cf. A000455, A008564, A008565, A008566, A008567, A008568, A008569, A008570, A008572, A008573, A010054. %K A008571 nonn,base,easy,tabf,changed %O A008571 0,5 %A A008571 _N. J. A. Sloane_