Expansion of 1/((1-x)(1-4x)(1-5x)(1-7x)).

Terms

a(0) =1a(1) =17a(2) =190a(3) =1770a(4) =14931a(5) =118587a(6) =905920a(7) =6742340a(8) =49288261a(9) =355826757a(10) =2546230050a(11) =18106416510a(12) =128181315991a(13) =904540692527