Thursday, November 25, 2010

Palindromic num3ers: Searching for 3-digit numbers such as

Here we search for 3-digit numbers that are palindromic in other bases, base 2, 3, 4, 5, 6, 7, 8 and 9.

The tool I'm using is :

For example,

Base 10 .................. Palindromic in base(s)
100 .......................... 1 0201 (base 3), 202 (base 7), 121 (base 9)
101 .......................... NO
102 .......................... NO
103 .......................... NO
104 .......................... 404 (base 5), 252 (base 6)
105 .......................... 1221 (base 4), 151 (base 8)
106 .......................... NO
107 .......................... 110 1011 (base 2), 212 (base 7)
108 .......................... NO
109 .......................... 414 (base 5), 131 (base 9)
110 .......................... NO
111 ........................... 303 (base 6)
112 ........................... 11011 (base 3)
113 ........................... NO
114 ........................... 424 (base 5), 222 (base 7)
115 ........................... NO
116 ........................... NO
117 ........................... 313 (base 6)
118 ........................... 141 (base 9)
119 ........................... 1110111 (base 2), 434 (base 5)
120 ........................... NO
121 ............................ 11111 (base 3), 232 (base 7), 171 (base 8)
122
123
124


Could you show how to find such numbers without going thru all 3-digit numbers?

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