Exponential convolution of Fibonacci numbers with themselves.

Terms

a(0) =0a(1) =0a(2) =2a(3) =6a(4) =22a(5) =70a(6) =230a(7) =742a(8) =2406a(9) =7782a(10) =25190a(11) =81510a(12) =263782a(13) =853606a(14) =2762342a(15) =8939110a(16) =28927590a(17) =93611622a(18) =302933606a(19) =980313702a(20) =3172361830a(21) =10265978470a(22) =33221404262a(23) =107506722406a(24) =347899061862