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 A011827 #10 Sep 19 2012 06:02:49 %S A011827 2,3,5,10,25,70,190,471,1060,2189,4203,7592,13027,21400,33868,51901, %T A011827 77334,112423,159905,223062,305789,412666,549034,721075,935896, %U A011827 1201617,1527463,1923860,2402535,2976620,3660760,4471225,5426026 %N A011827 f-vectors for simplicial complexes of dimension at most 2 on at most n-1 vertices. %F A011827 a(n+1)= (2*n^6 -6*n^5 +5*n^4 +60*n^3 -7*n^2 +306*n +720)/360 fits terms up to 5426026. [_Frank Ellermann_] %F A011827 Empirical G.f.: -x*(x^6-7*x^5+25*x^4-32*x^3+26*x^2-11*x+2)/(x-1)^7. [_Colin Barker_, Sep 19 2012] %Y A011827 Cf. A011826. %K A011827 nonn %O A011827 1,1 %A A011827 Svante Linusson (linusson(AT)math.kth.se)