Column of Kempner tableau.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =14a(6) =46a(7) =224a(8) =1024a(9) =6320a(10) =36976a(11) =275792a(12) =1965664a(13) =17180144a(14) =144361456a(15) =1446351104a(16) =13997185024a(17) =158116017920