1562498

Appears in sequences

• a(n)^2 is the smallest positive square that contains n consecutive internal 0's.at n=7A066392
• First differences of A087404: a(n) = A087404(n) - A087404(n-1), a(0) = A087404(0).at n=9A087405
• Numbers, a(n) where binomial(a(n), 5n-1) == 0 (mod 5) and binomial(a(n), k) != 0 (mod 5) for k != 5n - 1.at n=30A224251