a(n) = A215723(n) / 2^(n-1).

Terms

a(0) =1a(1) =0a(2) =1a(3) =2a(4) =3a(5) =4a(6) =8a(7) =18a(8) =27a(9) =44a(10) =267a(11) =1024a(12) =3645a(13) =6144a(14) =23859a(15) =50176a(16) =187377a(17) =531468a(18) =3302697a(19) =10616832a(20) =39337984a(21) =102546588a(22) =568833245a(23) =3073593600a(24) =8721488875a(25) =32998447572a(26) =164855413835a(27) =572108938470