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 A057132 #9 May 10 2013 12:44:31 %S A057132 2,2,8,32,1088,6385408,3661265482403840, %T A057132 8439542885406321273453577886433280, %U A057132 319091956672498334572163381930897860393704528363200229220601489839357952 %N A057132 Number of equivalence classes of self-dual Boolean functions of n variables under action of symmetric group S_n. %D A057132 D. E. Knuth, The Art of Computer Programming, Vol. 4A, Section 7.1.1, p. 79. %H A057132 <a href="/index/Bo#Boolean">Index entries for sequences related to Boolean functions</a> %Y A057132 Cf. A001531, A057133, A057134. %K A057132 nonn %O A057132 1,1 %A A057132 _Vladeta Jovovic_, Aug 11 2000