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 A199582 #10 Jun 02 2025 05:24:51 %S A199582 1,1,2,3,7,13,29,53,107,211,431,809,1619,3037,6079,11467,22937,43541, %T A199582 87083,166183,332393,636761,1273541,2448049,4896103,9438851,18877711, %U A199582 36484271,72968563,141332173,282664351,548544487,1097088989,2132671027,4265342057 %N A199582 Central terms of the triangle in A199333: a(n) = A199333(n,[n/2]). %C A199582 a(n) = max(A199333(n,k): 0<=k<=n/2) = A006530(A199695(n)) = A006530(A199696(n)); %C A199582 a(2*n) = A007918(a(2*n-1)) for n > 0. %H A199582 Reinhard Zumkeller, <a href="/A199582/b199582.txt">Table of n, a(n) for n = 0..150</a> %o A199582 (Haskell) %o A199582 a199582 n = a199333_row n !! (n `div` 2) %Y A199582 Cf. A199581, A001405. %K A199582 nonn %O A199582 0,3 %A A199582 _Reinhard Zumkeller_, Nov 09 2011