Sum over all partitions of n of the bitwise XOR of the parts.

Terms

a(0) =0a(1) =1a(2) =2a(3) =7a(4) =8a(5) =19a(6) =26a(7) =61a(8) =70a(9) =126a(10) =146a(11) =270a(12) =308a(13) =519a(14) =604a(15) =1054a(16) =1222a(17) =1929a(18) =2208a(19) =3454a(20) =3930a(21) =5862a(22) =6576a(23) =9833a(24) =11102a(25) =16052a(26) =17904a(27) =25752a(28) =28764a(29) =40479