2-Fubini numbers.

Terms

a(0) =2a(1) =10a(2) =62a(3) =466a(4) =4142a(5) =42610a(6) =498542a(7) =6541426a(8) =95160302a(9) =1520385010a(10) =26468935022a(11) =498766780786