Number of different values obtained by evaluating all different parenthesizations of 1/2/3/4/.../n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =16a(6) =32a(7) =60a(8) =116a(9) =192a(10) =384a(11) =544a(12) =1088a(13) =1736a(14) =2576a(15) =3824a(16) =7648a(17) =10352a(18) =20704a(19) =28096a(20) =40256a(21) =62128a(22) =124256a(23) =155488a(24) =227872a(25) =349248a(26) =470352a(27) =622128a(28) =1244256a(29) =1499232