a(n) is the least number larger than 1 which is a self number in all the bases 2 <= b <= n.
A344512
a(n) is the least number larger than 1 which is a self number in all the bases 2 <= b <= n.
Terms
- a(0) =4a(1) =13a(2) =13a(3) =13a(4) =287a(5) =287a(6) =2971a(7) =2971a(8) =27163a(9) =27163a(10) =90163a(11) =90163a(12) =5940609a(13) =5940609a(14) =6069129a(15) =6069129a(16) =276404649a(17) =276404649
External references
- oeis: A344512