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 A227724 #22 Oct 31 2021 22:57:13 %S A227724 0,0,1,0,3,0,0,7,0,7,0,15,0,105,750 %N A227724 T(n,k) = number of small equivalence classes of half full n-ary Boolean functions that contain 2^k functions. %C A227724 Like A227725, but counting only small equivalence classes (sec) of half full Boolean functions, i.e. those with an equal number of zeros and ones. %H A227724 Tilman Piesk, <a href="http://en.wikiversity.org/wiki/3-ary_Boolean_functions;_half_full_secs">Example for row 3</a> %H A227724 Tilman Piesk, <a href="http://en.wikiversity.org/wiki/Equivalence_classes_of_Boolean_functions#sec">Small equivalence classes of Boolean functions</a> %H A227724 <a href="/index/Bo#Boolean">Index entries for sequences related to Boolean functions</a> %e A227724 Triangle begins: Row sums (central numbers of A054724) %e A227724 0 0 %e A227724 0 1 1 %e A227724 0 3 0 3 %e A227724 0 7 0 7 14 %e A227724 0 15 0 105 750 870 %Y A227724 Cf. A227725, A054724, A000225. %K A227724 nonn,tabl,more %O A227724 0,5 %A A227724 _Tilman Piesk_, Jul 22 2013