Convolution of Fibonacci numbers and A000201.

Terms

a(0) =1a(1) =4a(2) =9a(3) =19a(4) =36a(5) =64a(6) =111a(7) =187a(8) =312a(9) =515a(10) =844a(11) =1378a(12) =2243a(13) =3643a(14) =5910a(15) =9578a(16) =15515a(17) =25122a(18) =40667a(19) =65821a(20) =106521a(21) =172377a(22) =278935a(23) =451350a(24) =730325a(25) =1181717a(26) =1912085a(27) =3093847a(28) =5005978a(29) =8099873