Self-describing sequence. See the sequence as a succession of digits: then a(n) is the position of a composite digit in the sequence.
A114318
Self-describing sequence. See the sequence as a succession of digits: then a(n) is the position of a composite digit in the sequence.
Terms
- a(0) =2a(1) =4a(2) =5a(3) =6a(4) =8a(5) =9a(6) =14a(7) =40a(8) =50a(9) =54a(10) =55a(11) =57a(12) =70a(13) =71a(14) =72a(15) =73a(16) =75a(17) =77a(18) =100a(19) =101a(20) =102a(21) =400a(22) =500a(23) =501a(24) =540a(25) =554a(26) =604a(27) =700a(28) =701a(29) =702
External references
- oeis: A114318