Strobogrammatic number
（重定向自Strobogrammatic）
A strobogrammatic number is a number that, given a base and given a set of glyphs, appears the same whether viewed normally or upside down by rotation of 180 degrees.
In base 10, a legible set of glyphs can be developed where 0, 1 and 8 are symmetrical around the horizontal axis, and 6 and 9 are the same as each other when rotated 180 degrees (such as the digit characters in ASCII using the font Stylus BT). In such a system, the first few strobogrammatic numbers are: