a(n) is the smallest number consisting of digits {1,...,n} that contains all the permutations of {1,...,n} as subsequences.

A136094

a(n) is the smallest number consisting of digits {1,...,n} that contains all the permutations of {1,...,n} as subsequences.

Terms

    a(0) =1a(1) =121a(2) =1213121a(3) =123412314213

External references