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 A160589 #12 Sep 08 2022 08:45:45
%S A160589 1,1,1,3,3,3,9,63,63,567,81,6237,1701,243243,1702701,5108103,5108103,
%T A160589 1772199,781539759,14849255421,14849255421,311834363841,3430178002251,
%U A160589 7172190368343,33811754593617,236682282155319,3076869668019147
%N A160589 Denominator of Laguerre(n, -10).
%H A160589 G. C. Greubel, <a href="/A160589/b160589.txt">Table of n, a(n) for n = 0..500</a>
%t A160589 Denominator[Table[LaguerreL[n, -10], {n, 0, 50}]] (* _G. C. Greubel_, May 13 2018 *)
%o A160589 (PARI) for(n=0,30, print1(denominator(sum(k=0,n, binomial(n,k)*(10^k/k!))), ", ")) \\ _G. C. Greubel_, May 13 2018
%o A160589 (PARI) a(n) = denominator(pollaguerre(n, 0, -10)); \\ _Michel Marcus_, Feb 05 2021
%o A160589 (Magma) [Denominator((&+[Binomial(n,k)*(10^k/Factorial(k)): k in [0..n]])): n in [0..30]]; // _G. C. Greubel_, May 13 2018
%Y A160589 For numerators see A160587.
%Y A160589 Cf. A289216.
%K A160589 nonn,frac
%O A160589 0,4
%A A160589 _N. J. A. Sloane_, Nov 14 2009