a(n) is least number > 0 such that the concatenation of a(1) ... a(n) is 11-gonal: (9n^2 - 7n)/2.

A264804

a(n) is least number > 0 such that the concatenation of a(1) ... a(n) is 11-gonal: (9n^2 - 7n)/2.

Terms

    a(0) =1a(1) =1a(2) =526a(3) =64095a(4) =21420730041

External references