Inverse Euler transform of A004104.

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =4a(5) =14a(6) =65a(7) =572a(8) =7434a(9) =163284a(10) =5736792a(11) =342169618a(12) =33534958026