Euler transform of the Bell numbers (A000110).

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =26a(5) =88a(6) =340a(7) =1411a(8) =6417a(9) =31474a(10) =166242a(11) =939646a(12) =5659613a(13) =36158227a(14) =244049562a(15) =1733702757a(16) =12919475840a(17) =100690425442a(18) =818554392962