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 A259602 #5 Jun 30 2015 17:12:57 %S A259602 4,9,16,25,16,4,9,16,25,36,25,16,25,36,49,64,81,100,64,16,25,36,49,64, %T A259602 81,64,36,49,64,81,100,81,64,81,100,121,144,169,196,144,64,100,144,81, %U A259602 36,49,64,81,64,49,64,81,100,121,144,169,144,121,100,64,81 %N A259602 (A259260(n) + A259260(n+1)) / 2. %C A259602 All terms are squares by definition of A259260. %H A259602 Reinhard Zumkeller, <a href="/A259602/b259602.txt">Table of n, a(n) for n = 1..10000</a> %o A259602 (Haskell) %o A259602 a259602 n = a259602_list !! (n-1) %o A259602 a259602_list = zipWith ((flip div 2 .) . (+)) %o A259602 a259260_list $ tail a259260_list %Y A259602 Cf. A259260, A000290, A086517, A259603, A259604, A259605. %K A259602 nonn %O A259602 1,1 %A A259602 _Reinhard Zumkeller_, Jun 30 2015