A053171 - OEIS

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A053171

Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a rotation of order 2.

81, 321, 825, 1689, 2601, 4185, 5529, 8145, 10401, 13137 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	CROSSREFS	`A053170(n) = 2 * (1 + a(n) + A053172(n) + A053173(n) + A053174(n)).` `Sequence in context: A183994 A158776 A101963 * A017162 A128607 A180090` `Adjacent sequences: A053168 A053169 A053170 * A053172 A053173 A053174`
	KEYWORD	`nonn`
	AUTHOR	`Ralf W. Grosse-Kunstleve (rwgk(AT)cci.lbl.gov), Mar 26 2000`

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Last modified February 15 13:49 EST 2012. Contains 205810 sequences.