A 'Strobogrammatic Number' is a kind of anagram (a 'visual pun', see 'Ambigram' in Wikipedia) in which a number appears the same when rotated 180 degrees. In other words, the numeral looks the same right-side up and upside down (e.g., 69, 96, 1001). A strobogrammatic prime is a strobogrammatic number that is also a prime number.
See "Strobogrammatic Number" in Wikipedia.
Nth Number | Strobogrammatic Number | Prime? |
---|---|---|
1 | 0 | |
2 | 1 | |
3 | 8 | |
4 | 11 | Prime |
5 | 69 | |
6 | 88 | |
7 | 96 | |
8 | 101 | Prime |
9 | 111 | |
10 | 181 | Prime |
11 | 609 | |
12 | 619 | Prime |
13 | 689 | |
14 | 808 | |
15 | 818 | |
16 | 888 | |
17 | 906 | |
18 | 916 | |
19 | 986 |