A087726 - OEIS

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A087726

Number of elements X in the matrix ring M_2(Z_n) such that X^2 == 0 mod n.

1, 4, 9, 28, 25, 36, 49, 112, 153, 100 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	CROSSREFS	`Cf. A066907, A000188.` `Sequence in context: A198095 A071913 A007872 * A101973 A071258 A120333` `Adjacent sequences: A087723 A087724 A087725 * A087727 A087728 A087729`
	KEYWORD	`mult,nonn`
	AUTHOR	`Yuval Dekel (dekelyuval(AT)hotmail.com), Sep 28 2003`

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Last modified February 14 01:35 EST 2012. Contains 205567 sequences.