999000
domain: N
Appears in sequences
- Numbers k such that k*(k+2) gives the concatenation of two numbers m and m-2.at n=4A116273
- a(n) = n^6 - n^3.at n=10A136006
- Numbers k such that k and k^2 use only the digits 0, 1, 5, 8 and 9.at n=52A136874
- Numbers k such that k and k^2 use only the digits 0, 1, 8 and 9.at n=51A136881
- Numbers with at least three 3s in their prime signature.at n=16A176359
- Numbers n such that n^3 has n as its middle digits.at n=18A227548
- a(n) = 100^n - 10^n.at n=3A276352
- Oblong (or pronic) numbers of the form x_n.y_n where z_n indicates the digit z repeated n times.at n=12A289980
- The sum of the first n terms of the sequence is the concatenation of the first n digits of the sequence, with a(1) = 1.at n=6A300000
- Numbers m such that the largest digit in the decimal expansion of 1/m is 1.at n=36A333402
- Numbers that have exactly three exponents in their prime factorization that are equal to 3.at n=16A386802