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 A295632 #6 Dec 19 2017 02:37:47 %S A295632 1,1,2,1,1,1,1,2,1,1,1,1,1,1,4,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1, %T A295632 2,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1, %U A295632 1,1,1,1,1,1,1,1,1,1,1,4,1,1,1,1,1,1,1 %N A295632 Write 1/Product_{n > 1}(1 - 1/n^s) in the form Product_{n > 1}(1 + a(n)/n^s). %C A295632 First negative entry is a(1024) = -4. %t A295632 nn=100; %t A295632 facs[n_]:=If[n<=1,{{}},Join@@Table[Map[Prepend[#,d]&,Select[facs[n/d],Min@@#>=d&]],{d,Rest[Divisors[n]]}]]; %t A295632 Solve[Table[Length[facs[n]]==Sum[Times@@a/@f,{f,Select[facs[n],UnsameQ@@#&]}],{n,2,nn}],Table[a[n],{n,2,nn}]][[1,All,2]] %Y A295632 Cf. A001055, A045778, A050376, A220418, A220420, A273866, A273873, A289501, A290261, A290262, A290971, A290973, A295279, A295635, A295636. %K A295632 sign %O A295632 2,3 %A A295632 _Gus Wiseman_, Nov 24 2017