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 A173696 #26 Nov 20 2016 03:59:55
%S A173696 1,1,1,2,2,3,5,7,10,15,23,34,51,77,115,173,259,389,584,877,1317,1978,
%T A173696 2970,4459,6696,10054,15097,22670,34041,51115,76754,115254,173064,
%U A173696 259872,390223,585956,879869,1321206,1983916,2979038,4473308,6717096,10086357,15145621,22742585,34150148,51279684,77001307
%N A173696 a(n) = ceiling(A117791(n)/2).
%H A173696 G. C. Greubel, <a href="/A173696/b173696.txt">Table of n, a(n) for n = 0..1000</a>
%F A173696 a(n) = A117791(n) - floor(A117791(n)/2) = ceiling(A117791(n)/2).
%t A173696 Ceiling[CoefficientList[Series[1/(1 - x - x^2 + x^4 - x^6), {x, 0, 50}], x]/2] (* _G. C. Greubel_, Nov 16 2016 *)
%Y A173696 Cf. A117791.
%K A173696 nonn,easy,less
%O A173696 0,4
%A A173696 _Roger L. Bagula_, Nov 25 2010
%E A173696 Erroneous leading zeros deleted by _Joerg Arndt_, Nov 17 2016
%E A173696 Sequence values corrected by _G. C. Greubel_, Nov 19 2016