Total number of parts in all compositions of n into relatively prime parts.

Terms

a(0) =1a(1) =2a(2) =7a(3) =17a(4) =47a(5) =102a(6) =255a(7) =556a(8) =1272a(9) =2766a(10) =6143a(11) =13183a(12) =28671a(13) =61182a(14) =131017a(15) =277952a(16) =589823a(17) =1243800a(18) =2621439a(19) =5502191a(20) =11534073a(21) =24111102a(22) =50331647a(23) =104843732a(24) =218103760a(25) =452956158a(26) =939522816a(27) =1946095599a(28) =4026531839a(29) =8321365194