Euler transform of A000960.

Terms

a(0) =1a(1) =4a(2) =11a(3) =30a(4) =70a(5) =174a(6) =403a(7) =934a(8) =2091a(9) =4648a(10) =10095a(11) =21733a(12) =46021a(13) =96489a(14) =199844a(15) =410036a(16) =832759a(17) =1677043a(18) =3348049a(19) =6632748a(20) =13040523a(21) =25460796a(22) =49374824a(23) =95146403a(24) =182232116a(25) =347015604a(26) =657138242a(27) =1237835490a(28) =2319809087a(29) =4326325573