Erroneous version of A129860.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =6a(7) =12a(8) =18a(9) =41a(10) =66a(11) =154a(12) =265a(13) =628a(14) =1132a(15) =2748a(16) =5098a(17) =12444