Sum over all partitions of n into distinct parts of the bitwise OR of the parts.

Terms

a(0) =0a(1) =1a(2) =2a(3) =6a(4) =7a(5) =13a(6) =20a(7) =35a(8) =42a(9) =58a(10) =75a(11) =104a(12) =133a(13) =176a(14) =233a(15) =327a(16) =402a(17) =500a(18) =616a(19) =762a(20) =916a(21) =1112a(22) =1329a(23) =1640a(24) =1967a(25) =2350a(26) =2787a(27) =3352a(28) =3960a(29) =4706