Sum of products of elements of nonempty subsets of divisors of n.

Terms

a(0) =1a(1) =5a(2) =7a(3) =29a(4) =11a(5) =167a(6) =15a(7) =269a(8) =79a(9) =395a(10) =23a(11) =10919a(12) =27a(13) =719a(14) =767a(15) =4589a(16) =35a(17) =31919a(18) =39a(19) =41579a(20) =1407a(21) =1655a(22) =47a(23) =2456999a(24) =311a(25) =2267a(26) =2239a(27) =104399a(28) =59a(29) =5499647