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 A094981 #16 Sep 08 2022 08:45:13
%S A094981 1,2,5,11,25,57,129,291,656,1477,3325,7481,16834,37876,85222,191751,
%T A094981 431439,970739,2184164,4914369,11057332,24878997,55977744,125949925,
%U A094981 283387333,637621500,1434648375,3227958844,7262907400,16341541651
%N A094981 a(n) = floor(9^n/4^n).
%H A094981 Vincenzo Librandi, <a href="/A094981/b094981.txt">Table of n, a(n) for n = 0..1000</a>
%t A094981 Table[ Floor[(9/4)^n], {n, 0, 30}]
%o A094981 (Magma) [Floor(9^n / 4^n): n in [0..40]]; // _Vincenzo Librandi_, Sep 08 2011
%o A094981 (Maxima) A094981(n):=floor(9^n/4^n)$ makelist(A094981(n),n,0,60); /* _Martin Ettl_, Oct 25 2012 */
%Y A094981 Cf. A002379, A094969 - A094999.
%K A094981 nonn,easy
%O A094981 0,2
%A A094981 _Robert G. Wilson v_, May 26 2004