Expansion of e.g.f. -log( 1 - log(1 - x)^4 / 24 ).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =10a(6) =85a(7) =735a(8) =6804a(9) =68544a(10) =754130a(11) =9044750a(12) =117779431a(13) =1657347978a(14) =25083122701a(15) =406495546275