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 A011846 #19 Feb 24 2025 11:47:42
%S A011846 0,0,0,0,0,0,0,0,0,0,1,5,22,71,200,500,1144,2431,4862,9237,16796,
%T A011846 29393,49742,81719,130750,204297,312455,468682,690690,1001500,1430715,
%U A011846 2016007,2804880,3856710,5245125,7060746
%N A011846 a(n) = floor( binomial(n,9)/10 ).
%H A011846 Vincenzo Librandi, <a href="/A011846/b011846.txt">Table of n, a(n) for n = 0..1000</a>
%H A011846 <a href="/index/Rec#order_259">Index entries for linear recurrences with constant coefficients</a>, order 259.
%F A011846 a(n) = floor( binomial(n+1,10)/(n+1)). [_Gary Detlefs_, Nov 23 2011]
%p A011846 A011846:=n->floor(binomial(n,9)/10): seq(A011846(n), n=0..60); # _Wesley Ivan Hurt_, Apr 10 2017
%t A011846 Table[Floor[Binomial[n, 9]/10], {n, 0, 50}] (* _Vincenzo Librandi_, Apr 11 2017 *)
%o A011846 (Magma) [Floor(Binomial(n,9)/10): n in [0..50]]; // _Vincenzo Librandi_, Apr 11 2017
%Y A011846 A column of triangle A011847.
%K A011846 nonn,easy
%O A011846 0,12
%A A011846 _N. J. A. Sloane_