Indices k at which either the leading digit or the length of A121805(k) changes.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =7a(6) =8a(7) =11a(8) =13a(9) =17a(10) =19a(11) =21a(12) =22a(13) =24a(14) =45a(15) =69a(16) =90a(17) =107a(18) =127a(19) =145a(20) =164a(21) =185a(22) =204a(23) =422a(24) =614a(25) =822a(26) =1007a(27) =1174a(28) =1392a(29) =1585