Convolution of Leonardo numbers with Jacobsthal numbers.

Terms

a(0) =0a(1) =1a(2) =2a(3) =7a(4) =16a(5) =39a(6) =86a(7) =189a(8) =402a(9) =847a(10) =1760a(11) =3631a(12) =7438a(13) =15165a(14) =30794a(15) =62343a(16) =125904a(17) =253783a(18) =510758a(19) =1026685a(20) =2061730a(21) =4136991a(22) =8295872a(23) =16627167a(24) =33311646a(25) =66716029a(26) =133582106a(27) =267406999a(28) =535206832a(29) =1071049287