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 A001328 M4309 N1804 #25 Nov 03 2015 17:15:04 %S A001328 6,438,3962646,10417184196975,9954761196199929077325, %T A001328 5057490251219818192322424165975972, %U A001328 1930587876541100645614895805509354549563927698736,746598793682620583344610283857629170831782164188262315836348333960 %N A001328 Number of equivalence classes of n-valued Post functions of 2 variables under action of semi-direct product of symmetric groups S_2 and S(2,n). %D A001328 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). %D A001328 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A001328 M. A. Harrison and R. G. High, <a href="http://dx.doi.org/10.1016/S0021-9800(68)80008-0">On the cycle index of a product of permutation groups</a>, J. Combin. Theory, 4 (1968), 277-299. %Y A001328 Cf. A001324. %K A001328 nonn %O A001328 2,1 %A A001328 _N. J. A. Sloane_ %E A001328 More terms from _Sean A. Irvine_, Oct 08 2015 %E A001328 Typo in a(3) corrected by _Sean A. Irvine_, Nov 03 2015