Position of n in A026188.

Terms

a(0) =1a(1) =4a(2) =2a(3) =7a(4) =3a(5) =9a(6) =10a(7) =13a(8) =5a(9) =15a(10) =6a(11) =17a(12) =18a(13) =21a(14) =8a(15) =24a(16) =25a(17) =27a(18) =28a(19) =31a(20) =11a(21) =33a(22) =12a(23) =35a(24) =36a(25) =39a(26) =14a(27) =41a(28) =42a(29) =44