Euler transform of A000292.

Terms

a(0) =1a(1) =5a(2) =15a(3) =45a(4) =120a(5) =331a(6) =855a(7) =2214a(8) =5545a(9) =13741a(10) =33362a(11) =80091a(12) =189339a(13) =442799a(14) =1023192a(15) =2340904a(16) =5302061a(17) =11902618a(18) =26488454a(19) =58479965a(20) =128120214a(21) =278680698a(22) =602009786a(23) =1292027222a(24) =2755684669a(25) =5842618668a(26) =12317175320a(27) =25825429276a(28) =53865355154a(29) =111786084504