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 A269128 #6 Mar 02 2016 21:15:09 %S A269128 1,3628799,2375632826877259,4376906243609822466600689, %T A269128 12672963300072129619006691134123819, %U A269128 46436573450646384263588550418764923934014699,192715148077645864521949395033355447100683080114830089,850648497663584994845965280567879628291013809845296658874866879 %N A269128 Number of sequences with n copies each of 1,2,...,10 avoiding the pattern 12...10. %H A269128 Alois P. Heinz, <a href="/A269128/b269128.txt">Table of n, a(n) for n = 0..50</a> %F A269128 a(n) = A071552(n) - A268846(n). %Y A269128 Row n=10 of A269129. %Y A269128 Cf. A071552, A268846. %K A269128 nonn %O A269128 0,2 %A A269128 _Alois P. Heinz_, Feb 19 2016