a(1) = 7, a(n) = smallest (nontrivial) multiple of a(n-1) containing n digits, a(n) not equal to 10*a(n-1).
A080451
a(1) = 7, a(n) = smallest (nontrivial) multiple of a(n-1) containing n digits, a(n) not equal to 10*a(n-1).
Terms
- a(0) =7a(1) =14a(2) =112a(3) =1008a(4) =11088a(5) =121968a(6) =1097712a(7) =12074832a(8) =108673488a(9) =1195408368a(10) =10758675312a(11) =118345428432
External references
- oeis: A080451