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A003463 (5^n - 1)/4.
(Formerly M4209)
+0
33
0, 1, 6, 31, 156, 781, 3906, 19531, 97656, 488281, 2441406, 12207031, 61035156, 305175781, 1525878906, 7629394531, 38146972656, 190734863281, 953674316406, 4768371582031, 23841857910156, 119209289550781, 596046447753906, 2980232238769531 (list; graph; listen)
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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.


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