Euler transform of A000579.

Terms

a(0) =1a(1) =8a(2) =36a(3) =148a(4) =554a(5) =2094a(6) =7624a(7) =27428a(8) =96231a(9) =332159a(10) =1126792a(11) =3769418a(12) =12437966a(13) =40544836a(14) =130643734a(15) =416494314a(16) =1314512589a(17) =4110009734a(18) =12737116845a(19) =39144344587a(20) =119350793207a(21) =361173596536