Convolved Fibonacci numbers.

Terms

a(0) =1a(1) =5a(2) =20a(3) =65a(4) =190a(5) =511a(6) =1295a(7) =3130a(8) =7285a(9) =16435a(10) =36122a(11) =77645a(12) =163730a(13) =339535a(14) =693835a(15) =1399478a(16) =2790100a(17) =5504650a(18) =10758050a(19) =20845300a(20) =40075630a(21) =76495450a(22) =145052300a(23) =273381350a(24) =512347975a(25) =955187033a(26) =1772132390a(27) =3272875935a(28) =6018885570a(29) =11024814945