Partial sums of A000014.

Terms

a(0) =0a(1) =1a(2) =2a(3) =2a(4) =3a(5) =4a(6) =6a(7) =8a(8) =12a(9) =17a(10) =27a(11) =41a(12) =67a(13) =109a(14) =187a(15) =319a(16) =568a(17) =1013a(18) =1855a(19) =3416a(20) =6404a(21) =12075a(22) =23056a(23) =44265a(24) =85737a(25) =166918a(26) =327094a(27) =643843a(28) =1273776a(29) =2529846