id:A053173 - OEIS Search Results

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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.

+0
6

174, 2694, 8814, 23310, 64782, 105678, 171006, 259446, 368334, 599022 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`A053170 = 2 * (1 + A053171 + A053172 + this sequence + A053174).` `Sequence in context: A045257 A025381 A077395 this_sequence A102538 A045145 A015806` `Adjacent sequences: A053170 A053171 A053172 this_sequence A053174 A053175 A053176`
	KEYWORD	`nonn`
	AUTHOR	`Ralf W. Grosse-Kunstleve (rwgk(AT)cci.lbl.gov), Mar 26 2000`

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

AT&T Labs Research