A bisection of A063522.

Terms

a(0) =1a(1) =63a(2) =305a(3) =847a(4) =1809a(5) =3311a(6) =5473a(7) =8415a(8) =12257a(9) =17119a(10) =23121a(11) =30383a(12) =39025a(13) =49167a(14) =60929a(15) =74431a(16) =89793a(17) =107135a(18) =126577a(19) =148239a(20) =172241a(21) =198703a(22) =227745a(23) =259487a(24) =294049a(25) =331551a(26) =372113a(27) =415855a(28) =462897a(29) =513359