A053173 - OEIS

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A053173

Number of 3 X 3 integer matrices with elements in the range [ -n,n ] which represent a four-fold rotation. Also the sequence for the corresponding four-fold rotoinversions.

174, 2694, 8814, 23310, 64782, 105678, 171006, 259446, 368334, 599022 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..10.`
	CROSSREFS	`A053170 = 2 * (1 + A053171 + A053172 + this sequence + A053174).` `Sequence in context: A077395 A185534 A185526 * A185525 A224433 A213866` `Adjacent sequences: A053170 A053171 A053172 * A053174 A053175 A053176`
	KEYWORD	`nonn`
	AUTHOR	`Ralf W. Grosse-Kunstleve (rwgk(AT)cci.lbl.gov), Mar 26 2000`
	STATUS	`approved`

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Last modified May 25 20:22 EDT 2013. Contains 225649 sequences.