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A056450
Palindromes using a maximum of four different symbols.
+0
14
4, 4, 16, 16, 64, 64, 256, 256, 1024, 1024, 4096, 4096, 16384, 16384, 65536, 65536, 262144, 262144, 1048576, 1048576, 4194304, 4194304, 16777216, 16777216, 67108864, 67108864, 268435456, 268435456
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 5 17:24 EST 2009. Contains 170342 sequences.
AT&T Labs Research
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