a(n) = smallest square containing n copies of the same nonzero digit.

A137434

a(n) = smallest square containing n copies of the same nonzero digit.

Terms

    a(0) =1a(1) =121a(2) =1444a(3) =44944a(4) =6441444a(5) =47444544a(6) =4434494464a(7) =44424414441

External references