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A000252 Number of invertible 2 X 2 matrices mod n. +0
21
1, 6, 48, 96, 480, 288, 2016, 1536, 3888, 2880, 13200, 4608, 26208, 12096, 23040, 24576, 78336, 23328, 123120, 46080, 96768, 79200, 267168, 73728, 300000, 157248, 314928, 193536, 682080, 138240, 892800, 393216, 633600, 470016, 967680, 373248 (list; graph; listen)
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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