Number of subsets A of {0,...,n-1} such that A contains 0 and n-1, and |A+A| > |A-A|.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =0a(10) =0a(11) =0a(12) =0a(13) =0a(14) =4a(15) =2a(16) =14a(17) =16a(18) =42a(19) =92a(20) =208a(21) =382a(22) =834a(23) =1748a(24) =3568a(25) =7066a(26) =14914a(27) =28618a(28) =60712a(29) =120872