Erroneous version of A005630.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =4a(7) =10a(8) =34a(9) =96a(10) =284a(11) =782a(12) =4226a(13) =6198