901000

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 1, 5, 8 and 9.at n=47A136874
• Numbers k such that k and k^2 use only the digits 0, 1, 6, 8 and 9.at n=51A136879
• Numbers k such that k and k^2 use only the digits 0, 1, 8 and 9.at n=47A136881
• Take a number z of x digits and consider any concatenation z = concat(y_1, y_2, ..., y_i) where y_1, y_2, ..., y_i have the same number of digits. Then be g(z) the product of the sums y_1 + y_2 + ... + y_i for all those concatenations. Sequence lists numbers z such that g(g(z)) = z. (See example.)at n=9A317628