Sum of the elements in the primitive subsets of the integers 1 to n.

Terms

a(0) =0a(1) =1a(2) =3a(3) =11a(4) =22a(5) =73a(6) =115a(7) =341a(8) =545a(9) =1141a(10) =1864a(11) =4849a(12) =6505a(13) =16285a(14) =26245a(15) =47093a(16) =68981a(17) =163937a(18) =221957a(19) =517937a(20) =726737a(21) =1312865a(22) =2093745a(23) =4753105a(24) =5953777a(25) =12335601a(26) =19516365a(27) =34112821a(28) =48603289a(29) =107522689