Place where n-th 1 occurs in A023125.

Terms

a(0) =1a(1) =9a(2) =24a(3) =47a(4) =77a(5) =114a(6) =159a(7) =211a(8) =271a(9) =338a(10) =412a(11) =494a(12) =583a(13) =680a(14) =784a(15) =895a(16) =1014a(17) =1140a(18) =1274a(19) =1415a(20) =1563a(21) =1719a(22) =1882a(23) =2052a(24) =2230a(25) =2415a(26) =2608a(27) =2808a(28) =3015a(29) =3230