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A037026 B-trees of order 4 with n leaves. +0
5
0, 1, 1, 1, 2, 2, 4, 5, 9, 15, 28, 45, 73, 116, 199, 345, 601, 1021, 1738, 2987, 5244, 9321, 16720, 30103, 54345, 97996, 176011, 314045, 556577, 980852, 1722451, 3020214, 5298570, 9316456, 16440262, 29136489, 51860214, 92643425, 165934156 (list; graph; listen)
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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.


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