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A052864
A simple grammar.
+0
2
0, 0, 2, 12, 82, 670, 6458, 72072, 915864, 13068768, 206998032, 3604604256, 68455569840, 1408152976464, 31191374639280, 740216664633984, 18736923967232256, 503916672279712896, 14349543617967990912
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
AT&T Labs Research
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