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 A028404 #14 Jul 08 2025 18:33:42 %S A028404 2,4,10,44,1333,467721009,1030285482262444082798370, %T A028404 10783320970547639134314329603627596568605613243959124417106 %N A028404 Number of types of Boolean functions of n variables under a certain group. %H A028404 I. Strazdins, <a href="https://doi.org/10.1023/A:1005769927571">Universal affine classification of Boolean functions</a>, Acta Applic. Math. 46 (1997), 147-167. %H A028404 <a href="/index/Bo#Boolean">Index entries for sequences related to Boolean functions</a> %Y A028404 Cf. A028405. %K A028404 nonn %O A028404 1,1 %A A028404 _N. J. A. Sloane_ %E A028404 More terms from _Vladeta Jovovic_, Feb 24 2000