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 A154659 #12 Jan 29 2019 10:36:44 %S A154659 1,1,2,6,24,120,720,5040,40320,362880,3628800,39916800,402796800, %T A154659 3770686080,33187593600,278598101040,2261952938160,17986137205800, %U A154659 141564484858104,1112444773251726,8787513806478134,70146437009397871,568128719132038153,4647312969412825372 %N A154659 Number of permutations of length n within distance 10. %H A154659 Alois P. Heinz, <a href="/A154659/b154659.txt">Table of n, a(n) for n = 0..100</a> %H A154659 Torleiv Kløve, <a href="http://www.ii.uib.no/publikasjoner/texrap/pdf/2008-376.pdf">Spheres of Permutations under the Infinity Norm - Permutations with limited displacement</a>, Reports in Informatics, Department of Informatics, University of Bergen, Norway, no. 376, November 2008. %Y A154659 Cf. A000045, A002524, A002526, A072856, A154654-A154658. %Y A154659 Column k=10 of A306209. %K A154659 nonn %O A154659 0,3 %A A154659 _Torleiv Kløve_, Jan 13 2009 %E A154659 More terms from _Alois P. Heinz_, Jan 13 2014