Place where n-th 1 occurs in A023118.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =7a(5) =10a(6) =13a(7) =17a(8) =21a(9) =26a(10) =31a(11) =36a(12) =42a(13) =48a(14) =55a(15) =62a(16) =70a(17) =78a(18) =87a(19) =96a(20) =105a(21) =115a(22) =125a(23) =136a(24) =147a(25) =159a(26) =171a(27) =184a(28) =197a(29) =210