400689

Appears in sequences

• Smallest nontrivial extension of n-th square which is a square not ending 00.at n=19A030688
• Squares with initial digit '4'.at n=36A045787
• Smallest n-digit square starting with 4.at n=5A067474
• Perfect powers using only composite digits 4,6,8,9 and 0.at n=32A083807
• Squares for which both the sum of the digits and the product of the digits are cubes.at n=20A117687
• The numbers n^2 as n runs through the numbers which are palindromes in base 2.at n=50A192775
• Number of n X 4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.at n=6A221274
• T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.at n=51A221275