Euler transform of Lucas numbers.

Terms

a(0) =1a(1) =1a(2) =4a(3) =8a(4) =21a(5) =44a(6) =103a(7) =217a(8) =477a(9) =999a(10) =2116a(11) =4373a(12) =9055a(13) =18464a(14) =37576a(15) =75725a(16) =152047a(17) =303158a(18) =602085a(19) =1189242a(20) =2340065a(21) =4584027a(22) =8947865a(23) =17399906a(24) =33725509a(25) =65153150a(26) =125493914a(27) =241011287a(28) =461611911a(29) =881806114