Number of weighted voting procedures.

Terms

a(0) =2a(1) =3a(2) =5a(3) =9a(4) =17a(5) =33a(6) =64a(7) =126a(8) =249a(9) =495a(10) =984a(11) =1962a(12) =3913a(13) =7815a(14) =15608a(15) =31194a(16) =62346a(17) =124650a(18) =249216a(19) =498348a(20) =996531a(21) =1992897a(22) =3985464a(23) =7970598a(24) =15940542a(25) =31880430a(26) =63759552a(27) =127517796a(28) =255032987a(29) =510063369