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 A291985 #9 Sep 09 2017 11:05:39 %S A291985 1,-1,0,-1,1,-1,2,-1,2,-3,2,-3,3,-3,4,-4,5,-5,5,-6,6,-7,7,-7,9,-9,9, %T A291985 -10,10,-11,12,-12,13,-14,14,-15,16,-16,17,-18,19,-20,20,-21,22,-23, %U A291985 24,-24,26,-27,27,-29,29,-30,32,-32,34,-35,35,-37,38,-39,40,-41,43 %N A291985 Expansion of 1/((1+x)*(1+x^2)*(1+x^3)*(1+x^4)*(1+x^5)). %H A291985 <a href="/index/Rec#order_15">Index entries for linear recurrences with constant coefficients</a>, signature (-1, -1, -2, -2, -3, -3, -3, -3, -3, -3, -2, -2, -1, -1, -1). %o A291985 (PARI) Vec(1/((1+x)*(1+x^2)*(1+x^3)*(1+x^4)*(1+x^5)) + O(x^100)) %Y A291985 Cf. A291954, A291983, A291984. %K A291985 sign %O A291985 0,7 %A A291985 _Seiichi Manyama_, Sep 07 2017