Position of n-th 1 in A031298.

Terms

a(0) =1a(1) =11a(2) =12a(3) =13a(4) =15a(5) =17a(6) =19a(7) =21a(8) =23a(9) =25a(10) =27a(11) =29a(12) =32a(13) =52a(14) =72a(15) =92a(16) =112a(17) =132a(18) =152a(19) =172a(20) =192a(21) =193a(22) =195a(23) =198a(24) =201a(25) =204a(26) =207a(27) =210a(28) =213a(29) =216