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 A008569 #23 Mar 23 2025 03:56:35 %S A008569 1,8,6,4,5,1,2,4,0,9,6,3,2,7,6,8,2,6,2,1,4,4,2,0,9,7,1,5,2,1,6,7,7,7, %T A008569 2,1,6,1,3,4,2,1,7,7,2,8,1,0,7,3,7,4,1,8,2,4,8,5,8,9,9,3,4,5,9,2,6,8, %U A008569 7,1,9,4,7,6,7,3,6,5,4,9,7,5,5,8,1,3,8,8,8,4,3,9,8,0,4,6,5,1,1 %N A008569 Digits of powers of 8. %C A008569 The constant whose decimal expansion is this sequence is irrational (Mahler, 1981). - _Amiram Eldar_, Mar 23 2025 %H A008569 Seiichi Manyama, <a href="/A008569/b008569.txt">Rows n = 0..100, flattened</a> %H A008569 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 A008569 Triangle begins: %e A008569 1; %e A008569 8; %e A008569 6, 4; %e A008569 5, 1, 2; %e A008569 4, 0, 9, 6; %e A008569 3, 2, 7, 6, 8; %e A008569 2, 6, 2, 1, 4, 4; %e A008569 2, 0, 9, 7, 1, 5, 2; %e A008569 ... %t A008569 IntegerDigits/@(8^Range[0,20])//Flatten (* _Harvey P. Dale_, Nov 14 2020 *) %Y A008569 Cf. A001018. %Y A008569 Cf. A000455, A008564, A008565, A008566, A008567, A008568, A008570, A008571, A008572, A008573, A010054. %K A008569 nonn,base,easy,tabf %O A008569 0,2 %A A008569 _N. J. A. Sloane_