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 A291353 #21 May 06 2025 15:38:09 %S A291353 10112359550561797752808988764044943820224719, %T A291353 1011235955056179775280898876404494382022471910112359550561797752808988764044943820224719 %N A291353 Numbers m with the property that shifting the rightmost digit of m to the left end multiplies the number by 9. %C A291353 For consistency with A146088 (similar for ratio k=2) and others, where an initial a(0) = 0 has been added, the same could be considered here. It would be compatible with the formula given for a(n). - _M. F. Hasler_, May 03 2025 %H A291353 Seiichi Manyama, <a href="/A291353/b291353.txt">Table of n, a(n) for n = 1..22</a> %H A291353 Wikipedia, <a href="https://en.wikipedia.org/wiki/Parasitic_number">Parasitic number</a>. %F A291353 a(n) = 9*(10^(44*n) - 1)/89. %Y A291353 Cf. A146088 (k=2), A146561 (k=3), A146569 (k=4), A146754 (k=5), A291354 (k=6), A291215 (k=7), A291321 (k=8), this sequence (k=9). %Y A291353 All these are subsequences of A034089 (except for an initial 0 in some of them). %Y A291353 Cf. A092697, A097717. %K A291353 nonn,base %O A291353 1,1 %A A291353 _Seiichi Manyama_, Aug 23 2017