Numerator of Sum_{i+j+k=n; i,j,k > 0} 1/(i*j*k).

Terms

a(0) =1a(1) =3a(2) =7a(3) =15a(4) =29a(5) =469a(6) =29531a(7) =1303a(8) =16103a(9) =190553a(10) =128977a(11) =9061a(12) =30946717a(13) =39646461a(14) =58433327a(15) =344499373a(16) =784809203a(17) =169704792667a(18) =665690574539a(19) =5667696059a(20) =337284946763a(23) =284451446729