Self-describing sequence. See the sequence as a succession of digits: then a(n) is the position of a prime digit in the sequence.
A114315
Self-describing sequence. See the sequence as a succession of digits: then a(n) is the position of a prime digit in the sequence.
Terms
- a(0) =4a(1) =6a(2) =8a(3) =20a(4) =21a(5) =24a(6) =40a(7) =41a(8) =44a(9) =46a(10) =48a(11) =52a(12) =60a(13) =70a(14) =80a(15) =81a(16) =84a(17) =86a(18) =88a(19) =90a(20) =102a(21) =204a(22) =305a(23) =476a(24) =485a(25) =600a(26) =649a(27) =650a(28) =660a(29) =664
External references
- oeis: A114315