Number of subsets A of {0,1,...,n-1} with |A+A| < |A-A|.

Terms

a(0) =0a(1) =0a(2) =0a(3) =2a(4) =8a(5) =24a(6) =62a(7) =150a(8) =338a(9) =738a(10) =1568a(11) =3282a(12) =6780a(13) =13904a(14) =28288a(15) =57342a(16) =115812a(17) =233426a(18) =469656a(19) =944000a(20) =1895194a(21) =3802762a(22) =7625328a(23) =15284798a(24) =30626642a(25) =61353084a(26) =122872144a(27) =246042562a(28) =492592948a(29) =986089652