Place where n-th 1 occurs in A023130.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =9a(5) =13a(6) =17a(7) =22a(8) =27a(9) =33a(10) =40a(11) =47a(12) =55a(13) =63a(14) =72a(15) =82a(16) =92a(17) =103a(18) =114a(19) =126a(20) =139a(21) =152a(22) =166a(23) =180a(24) =195a(25) =211a(26) =227a(27) =244a(28) =261a(29) =279