Place where n-th 1 occurs in A023128.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =10a(6) =13a(7) =16a(8) =20a(9) =24a(10) =29a(11) =34a(12) =39a(13) =45a(14) =51a(15) =58a(16) =65a(17) =72a(18) =80a(19) =88a(20) =97a(21) =106a(22) =115a(23) =125a(24) =135a(25) =146a(26) =157a(27) =169a(28) =181a(29) =193