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 A109455 #8 Aug 09 2015 00:00:46 %S A109455 2,4,10,34,178,1720,590440 %N A109455 Number of equivalence classes of threshold functions under permutations of the variables. %D A109455 D. E. Knuth, The Art of Computer Programming, Vol. 4A, Section 7.1.1, p. 79. %D A109455 S. Muroga, Threshold Logic and Its Applications. Wiley, NY, 1971. [Background] %Y A109455 Cf. A002078, A000617, A001529. %K A109455 nonn,hard,more %O A109455 0,1 %A A109455 _Don Knuth_, Aug 17 2005