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 A094735 #21 Oct 09 2017 02:16:04
%S A094735 0,1,1,8,75,796,8051,73788,623155,4965836,38028051,283400668,
%T A094735 2072874035,14966280876,107083717651,761327161148,5388524417715,
%U A094735 38017832427916,267623218488851,1880883687651228,13203904989574195,92616374066478956,649261556308773651
%N A094735 Number of connected 3-element multiantichains on a labeled n-set.
%H A094735 G. C. Greubel, <a href="/A094735/b094735.txt">Table of n, a(n) for n = 0..1000</a>
%H A094735 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (22,-190,820,-1849,2038,-840).
%F A094735 E.g.f.: (1/3!)*(exp(7*x) - 6*exp(5*x) + 3*exp(4*x) + 20*exp(3*x) - 39*exp(2*x) + 35*exp(x) - 14).
%F A094735 G.f.: -x*(1960*x^5 - 1695*x^4 + 731*x^3 - 176*x^2 + 21*x - 1) / ((x-1)*(2*x-1)*(3*x-1)*(4*x-1)*(5*x-1)*(7*x-1)). - _Colin Barker_, Jul 13 2013
%F A094735 a(n) = (7^n - 6*5^n + 20*3^n + 3*4^n - 39*2^n + 35)/6, n > 0. - _Benedict W. J. Irwin_, May 25 2016
%t A094735 Table[(7^n-6*5^n+20*3^n+3*4^n-39*2^n+35)/6(1-UnitStep[-n]), {n, 0, 20}] (* _Benedict W. J. Irwin_, May 25 2016 *)
%o A094735 (PARI) x='x+O('x^50); concat([0], Vec(serlaplace((1/3!)*(exp(7*x) - 6*exp(5*x) + 3*exp(4*x) + 20*exp(3*x) - 39*exp(2*x) + 35*exp(x) - 14)))) \\ _G. C. Greubel_, Oct 08 2017
%Y A094735 Cf. A094033-A094037, A094729-A094738.
%K A094735 nonn,easy
%O A094735 0,4
%A A094735 Goran Kilibarda, _Vladeta Jovovic_, May 24 2004
%E A094735 More terms from _Colin Barker_, Jul 13 2013