Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A strictly non-palindromic number is an integer n that is not palindromic in any numeral system with a base b in the range 2 b n 2. For example, the number six is written as 110 in base 2, 20 in base 3 and 12 in base 4, none of which is a palindrome so 6 is strictly non-palindromic. The sequence of strictly non-palindromic numbers (sequence A016038 in OEIS) starts: 1, 2, 3, 4, 6, 11, 19, 47, 53, 79, 103, 137, 139, 149, 163, 167, 179, 223, 263, 269, 283, 293,