Convolution of Lucas numbers and A001950.

Terms

a(0) =2a(1) =11a(2) =30a(3) =65a(4) =128a(5) =234a(6) =410a(7) =700a(8) =1173a(9) =1945a(10) =3198a(11) =5230a(12) =8524a(13) =13858a(14) =22493a(15) =36470a(16) =59089a(17) =95694a(18) =154926a(19) =250770a(20) =405854a(21) =656789a(22) =1062817a(23) =1719788a(24) =2782794a(25) =4502780a(26) =7285780