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A056990
Number of nonsingular n X n (-1,1)-matrices.
+0
6
2, 8, 192, 22272, 11550720, 25629327360, 236229525504000, 8858686914082897920, 1331751782100764385607680
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Maintained by
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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
AT&T Labs Research
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