Convolved Fibonacci numbers.

Terms

a(0) =1a(1) =4a(2) =14a(3) =40a(4) =105a(5) =256a(6) =594a(7) =1324a(8) =2860a(9) =6020a(10) =12402a(11) =25088a(12) =49963a(13) =98160a(14) =190570a(15) =366108a(16) =696787a(17) =1315072a(18) =2463300a(19) =4582600a(20) =8472280a(21) =15574520a(22) =28481220a(23) =51833600a(24) =93914325a(25) =169457708a(26) =304597382a(27) =545556512a(28) =973877245a(29) =1733053440