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 A119844 #9 Mar 03 2016 12:06:20 %S A119844 1,2,6,14,22,252,17526,9278038,23694308,1186593143406, %T A119844 789632365568454684,3199548374111958458274, %U A119844 849440501364681630324594977448 %N A119844 Records in A119842. %t A119844 b[s_, t_] := b[s, t] = If[Length[s] < 1, 1, Sum[If[Mod[PrimeOmega[x], 2] == 1 - t && Length[Select[s, Mod[#, x] == 0 &]] == 1, b[s~Complement~{x}, 1 - t], 0], {x, s}]]; a[n_] := a[n] = Module[{l, m}, l = Sort[ FactorInteger[n], #1[[2]] > #2[[2]] &]; m = Product[Prime[i]^l[[i]][[2]], {i, 1, Length[l]}]; b[Divisors[m][[2 ;; -2]], Mod[PrimeOmega[m], 2]]]; Reap[For[record = 0; k = 1, k < 10^4, k++, If[a[k] > record, record = a[k]; Print[k, " ", a[k]]; Sow[a[k]]]]][[2, 1]] (* _Jean-François Alcover_, Mar 03 2016, after _Alois P. Heinz_ *) %Y A119844 a(n) = A119842(A119843(n)). %K A119844 nonn %O A119844 1,2 %A A119844 _Antti Karttunen_, Jun 04 2006 %E A119844 a(9)-a(13) from _Alois P. Heinz_, Feb 26 2016