Smallest number that can be formed by using the nonzero digits of the numbers 1+n(n-1)/2 through n(n+1)/2.
A076068
Smallest number that can be formed by using the nonzero digits of the numbers 1+n(n-1)/2 through n(n+1)/2.
Terms
- a(0) =1a(1) =23a(2) =456a(3) =1789a(4) =1111112345a(5) =11111226789
External references
- oeis: A076068