333400

Appears in sequences

• Find smallest pair (x,y) such that x^2 - y^2 = 11...1 (n times) = (10^n-1)/9; sequence gives value of x.at n=11A048611
• Number of 6 X n 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=11A281405
• Numbers whose square starts and ends with exactly 4 identical digits.at n=2A346942
• Numbers k >= 1 such that k^2 - r^2 is a repunit (A002275) for some 1 <= r < k.at n=31A389493