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 A008573 #23 Mar 23 2025 03:56:45 %S A008573 1,1,3,1,6,9,2,1,9,7,2,8,5,6,1,3,7,1,2,9,3,4,8,2,6,8,0,9,6,2,7,4,8,5, %T A008573 1,7,8,1,5,7,3,0,7,2,1,1,0,6,0,4,4,9,9,3,7,3,1,3,7,8,5,8,4,9,1,8,4,9, %U A008573 1,7,9,2,1,6,0,3,9,4,0,3,7,2,3,2,9,8,0,8,5,1,2,2,4,8,1,3,0,2,8 %N A008573 Digits of powers of 13. %C A008573 The constant whose decimal expansion is this sequence is irrational (Mahler, 1981). - _Amiram Eldar_, Mar 23 2025 %H A008573 Seiichi Manyama, <a href="/A008573/b008573.txt">Rows n = 0..100, flattened</a> %H A008573 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 A008573 Triangle begins: %e A008573 1; %e A008573 1, 3; %e A008573 1, 6, 9; %e A008573 2, 1, 9, 7; %e A008573 2, 8, 5, 6, 1; %e A008573 3, 7, 1, 2, 9, 3; %e A008573 4, 8, 2, 6, 8, 0, 9; %e A008573 ... %t A008573 IntegerDigits/@(13^Range[0,20])//Flatten (* _Harvey P. Dale_, Oct 24 2017 *) %Y A008573 Cf. A001022. %Y A008573 Cf. A000455, A008564, A008565, A008566, A008567, A008568, A008569, A008570, A008571, A008572, A010054. %K A008573 nonn,base,easy,tabf %O A008573 0,3 %A A008573 _N. J. A. Sloane_