300030

Appears in sequences

• n repeated in decimal representation, but separated by enough zeros that the square has the pattern (n^2)(2n^2)(n^2).at n=29A077431
• Numbers whose decimal expansion contains only 0's and 3's.at n=34A169966
• Positive numbers k such that the decimal expansions of k and 1/k have the same nonzero digits.at n=31A376089