Duplicate of A079816.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =7a(6) =12a(7) =20a(8) =34a(9) =59a(10) =102a(11) =175a(12) =300a(13) =515a(14) =885a(15) =1521a(16) =2613a(17) =4488a(18) =7709a(19) =13243