A053172 - OEIS

A053172

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

308, 1916, 9572, 20732, 43148, 73052, 155156, 219716, 331892, 440036 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..10.`
	FORMULA	`A053170(n) = 2 * (1 + A053171(n) + a(n) + A053173(n) + A053174(n)).`
	CROSSREFS	`Cf. A053170, A053171, A053173, A053174.` `Sequence in context: A249552 A237457 A234211 * A343273 A337955 A091552` `Adjacent sequences: A053169 A053170 A053171 * A053173 A053174 A053175`
	KEYWORD	`nonn,more`
	AUTHOR	`Ralf W. Grosse-Kunstleve, Mar 26 2000`
	STATUS	`approved`

Last modified January 29 00:02 EST 2023. Contains 359905 sequences. (Running on oeis4.)