Number of binary words of length n that are not rich.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =4a(9) =24a(10) =92a(11) =292a(12) =850a(13) =2276a(14) =5766a(15) =13968a(16) =32690a(17) =74368a(18) =165442a(19) =361104a(20) =776116a(21) =1646566a(22) =3456030a(23) =7189232a(24) =14844878a(25) =30464914