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A145549
Number of distinct values taken by 9^9^...^9 (with n 9's and parentheses inserted in all possible ways).
+0
9
1, 1, 2, 4, 9, 20, 48, 115, 286, 719, 1842, 4766, 12485, 32969, 87795, 235326, 634664, 1720573, 4686829, 12820504, 35204254, 97001655, 268120807, 743236814, 2065709551, 5755253457
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.
AT&T Labs Research
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