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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