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 A317526 #10 Jul 31 2018 10:00:29 %S A317526 1010, %T A317526 11100917431192660550458715596330275229357798165137614678899082568807339449541284403669724770642201834862385321, %U A317526 12100840336134453781512605042016806722689075630252,13100775193798449612403,141007194244604316546762589928057553956834532374 %N A317526 Smallest "Shift and erase" numbers beginning by (9 + n). See the Comments section. %C A317526 To divide a(n) by (9 + n), merely shift the leftmost digit of a(n) to the end of a(n) and erase the next digit. %C A317526 The sequence is finite: there are no numbers having this property that start with 20,21,22,23,24,...97,98,99. %H A317526 Jean-Marc Falcoz, <a href="/A317526/b317526.txt">Table of n, a(n) for n = 1..10</a> %e A317526 To divide a(1) = 1010 by 10, just shift the first digit 1 to the end and erase 0 (which gives 101 -- and, indeed, 101*10 = 1010). %e A317526 To divide a(4) = 13100775193798449612403 by 13, just shift the first digit 1 to the end and erase 3 (which gives 1007751937984496124031 -- and, indeed, 1007751937984496124031*13 = 13100775193798449612403). %Y A317526 Cf. A092697 (least n-parasitic numbers). %K A317526 nonn,base,fini %O A317526 1,1 %A A317526 _Eric Angelini_ and _Jean-Marc Falcoz_, Jul 30 2018