Erroneous version of A141347.

Terms

a(0) =3a(1) =7a(2) =13a(3) =27a(4) =39a(5) =83a(6) =117a(7) =205a(8) =291a(9) =555a(10) =634a(11) =1277a(12) =1567a(13) =2368a(14) =3315a(15) =5740a(16) =6228a(17) =11404