a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 21.

A093221

a(n) is the largest number such that all of a(n)'s length-n substrings are distinct and divisible by 21.

Terms

    a(0) =0a(1) =8421a(2) =75672a(3) =760273087a(5) =99997899997

External references