Total number of elements in all primitive subsets of the integers 1 to n.

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =8a(5) =21a(6) =29a(7) =73a(8) =105a(9) =193a(10) =288a(11) =677a(12) =853a(13) =1957a(14) =2961a(15) =4913a(16) =6809a(17) =15145a(18) =19605a(19) =43105a(20) =57889a(21) =98849a(22) =151457a(23) =327505a(24) =397825a(25) =784945a(26) =1201189a(27) =2009229a(28) =2772729a(29) =5901185