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 A182584 #8 Jul 13 2013 12:03:46 %S A182584 1,1,4,5,20,27,112,156,660,935,4004,5733,24752,35700,155040,224808, %T A182584 980628,1427679,6249100,9126975,40060020,58659315,258048960,378658800, %U A182584 1668903600,2453288292,10829900592,15944020316,70480305440,103897691640,459823234112 %N A182584 Central terms of the triangle A182579. %C A182584 a(n) = A182579(2*n,n); %C A182584 a(2*n+1) = A052227(n). %H A182584 Reinhard Zumkeller, <a href="/A182584/b182584.txt">Table of n, a(n) for n = 0..1000</a> %o A182584 (Haskell) %o A182584 a182584 n = a182579 (2*n) n %K A182584 nonn %O A182584 0,3 %A A182584 _Reinhard Zumkeller_, May 06 2012