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 A165734 #23 Mar 17 2024 02:12:17
%S A165734 6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,
%T A165734 30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,6,30,
%U A165734 6,30
%N A165734 Period 2: repeat 6,30.
%C A165734 Continued fraction expansion of (15+sqrt(230))/5. - _Klaus Brockhaus_, Apr 28 2010
%H A165734 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0,1).
%F A165734 From _Philippe Deléham_, Sep 27 2009: (Start)
%F A165734 G.f.: 6x(1+5x)/((1-x)(1+x)).
%F A165734 a(n) = 6*A010686(n-1). (End)
%t A165734 PadRight[{},120,{6,30}] (* _Harvey P. Dale_, Jun 03 2019 *)
%o A165734 (PARI) a(n)=30-n%2*24 \\ _Charles R Greathouse IV_, Jun 02 2011
%Y A165734 Cf. A124886, A002445, A040214.
%K A165734 nonn,easy
%O A165734 1,1
%A A165734 _Paul Curtz_, Sep 25 2009
%E A165734 Edited by _N. J. A. Sloane_, Sep 25 2009