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 A134906 #12 Aug 09 2015 01:57:49
%S A134906 1,18,4,2,147,9,3,7181,15,6,
%T A134906 1481148085628412373142705746959543003289563510386989143402672337886302490562710486232930994662688988,
%U A134906 23,9,1,36,12,1,57,17,3,97,22,5,203,29,8
%N A134906 a(n) = ceiling(n*exp(-tan(n))).
%H A134906 Vincenzo Librandi, <a href="/A134906/b134906.txt">Table of n, a(n) for n = 1..1000</a>
%t A134906 Table[Ceiling[n Exp[-Tan[n]]], {n, 30}] (* _Vincenzo Librandi_, Feb 18 2013 *)
%Y A134906 Cf. A134890, A134891, A134892, A134902, A134903, A134904, A134905.
%K A134906 nonn,easy
%O A134906 1,2
%A A134906 _Mohammad K. Azarian_, Nov 14 2007
%E A134906 Offset corrected by _Mohammad K. Azarian_, Nov 19 2008
%E A134906 a(11) corrected by _Vincenzo Librandi_, Feb 18 2013