Numbers in base 10 that are palindromic in bases 2, 4, and 16: Difference between revisions
Numbers in base 10 that are palindromic in bases 2, 4, and 16 (view source)
Revision as of 22:46, 6 April 2023
, 1 year ago→{{header|Ruby}}: Add Ruby
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(→{{header|Ruby}}: Add Ruby) |
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Found 22 numbers
done...
</pre>
=={{header|Ruby}}==
<syntaxhighlight lang="ruby">res = (0..25000).select do |n|
[2, 4, 16].all? do |base|
b = n.to_s(base)
b == b.reverse
end
end
puts res.join(" ")</syntaxhighlight>
{{out}}
<pre>
0 1 3 5 15 17 51 85 255 257 273 771 819 1285 1365 3855 4095 4097 4369 12291 13107 20485 21845
</pre>
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