a(n)^2 is the smallest positive square that contains n consecutive internal 0's.

A066392

a(n)^2 is the smallest positive square that contains n consecutive internal 0's.

Terms

    a(0) =1a(1) =32a(2) =245a(3) =1249a(4) =6245a(5) =43589a(6) =678233a(7) =1562498a(8) =19531257a(9) =254460213a(10) =508920426a(11) =894427191a(12) =4472135955a(13) =817871093755

External references