id:A087785 - OEIS Search Results

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Number of elements in GL(2,Z_n) x with x^2 == -I mod n where I is the identity matrix.

+0
1

1, 4, 6, 12, 32, 24, 42, 48, 54, 128, 110, 72, 184, 168, 192, 192, 308, 216, 342, 384, 252, 440, 506, 288, 752, 736, 486, 504, 872, 768, 930, 768, 660, 1232, 1344, 648, 1408, 1368, 1104, 1536, 1724, 1008, 1806, 1320, 1728, 2024, 2162, 1152, 2058, 3008, 1848 (list; graph; listen)

	OFFSET	`1,2`
	CROSSREFS	`Cf. A066907, A000089.` `Sequence in context: A025017 A133427 A027070 this_sequence A081198 A073167 A060202` `Adjacent sequences: A087782 A087783 A087784 this_sequence A087786 A087787 A087788`
	KEYWORD	`mult,nonn`
	AUTHOR	`Yuval Dekel (dekelyuval(AT)hotmail.com), Oct 06 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jun 17 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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