Having specified two initial terms, the "Half-Fibonacci" sequence proceeds like the Fibonacci sequence, except that the terms are halved before being added if they are even.

A120424

Having specified two initial terms, the "Half-Fibonacci" sequence proceeds like the Fibonacci sequence, except that the terms are halved before being added if they are even.

Terms

    a(0) =1a(1) =3a(2) =4a(3) =5a(4) =7a(5) =12a(6) =13a(7) =19a(8) =32a(9) =35a(10) =51a(11) =86a(12) =94a(13) =90a(14) =92a(15) =91a(16) =137a(17) =228a(18) =251a(19) =365a(20) =616a(21) =673a(22) =981a(23) =1654a(24) =1808a(25) =1731a(26) =2635a(27) =4366a(28) =4818a(29) =4592

External references