Place where n-th 1 occurs in A023115.

Terms

a(0) =1a(1) =2a(2) =4a(3) =7a(4) =10a(5) =14a(6) =19a(7) =24a(8) =30a(9) =37a(10) =45a(11) =53a(12) =62a(13) =72a(14) =82a(15) =93a(16) =105a(17) =118a(18) =131a(19) =145a(20) =160a(21) =175a(22) =191a(23) =208a(24) =225a(25) =243a(26) =262a(27) =282a(28) =302a(29) =323