Inverse EULER transform of A064831 (with its initial 1 omitted).

Terms

a(0) =1a(1) =3a(2) =3a(3) =5a(4) =10a(5) =24a(6) =50a(7) =120a(8) =270a(9) =640a(10) =1500a(11) =3600a(12) =8610a(13) =20880a(14) =50700a(15) =124024a(16) =304290a(17) =750120a(18) =1854400a(19) =4600200a(20) =11440548a(21) =28527320a(22) =71289000a(23) =178526880a(24) =447910470a(25) =1125750120a(26) =2833885800a(27) =7144449920a(28) =18036373140a(29) =45591631800