Numbers k such that the concatenation of n successive descending digits (1,0,9,8,7,...) starting with 1 is prime.
A120828
Numbers k such that the concatenation of n successive descending digits (1,0,9,8,7,...) starting with 1 is prime.
Terms
- a(0) =3a(1) =5a(2) =35a(3) =139a(4) =153a(5) =253a(6) =1053a(7) =2015a(8) =3703a(9) =6933a(10) =8173a(11) =11959
External references
- oeis: A120828