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 A117071 #12 May 01 2015 07:42:04 %S A117071 3,7,14,26,49,92,177,346,683,1356,2699,5384,10753,21490,42963,85908, %T A117071 171797,343574,687127,1374232,2748439,5496852,10993677,21987326, %U A117071 43974623,87949216,175898401,351796770,703593507,1407186980,2814373925,5628747814,11257495591 %N A117071 Number at middle of segment n of A078783. %C A117071 a(n) = A078783(3*n-1). %D A117071 N. J. A. Sloane and Allan Wilks, On sequences of Recaman type, paper in preparation, 2006. %H A117071 Reinhard Zumkeller, <a href="/A117071/b117071.txt">Table of n, a(n) for n = 1..3000</a> %o A117071 (Haskell) %o A117071 a117071 n = a117071_list !! (n-1) %o A117071 a117071_list = tSegments !! 1 %o A117071 -- tSegments defined in A117070. -- _Reinhard Zumkeller_, May 01 2015 %Y A117071 Cf. A078783, A117070, A117072. %K A117071 nonn %O A117071 1,1 %A A117071 _N. J. A. Sloane_, Apr 18 2006