A132221 - OEIS

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A132221

Number of imprimitive transitive groups of order n.

0, 0, 0, 3, 0, 12, 0, 43, 23, 36, 0, 295, 0, 59, 98, 1932, 0, 979, 0, 1113, 155, 55, 0, 24995, 183, 89, 2377, 1840, 0, 5708, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	COMMENTS	`Smallest order of an imprimitive group is 4. The groups of order 4 are C_4, V_4, D_4.` `Imprimitive groups do not exist with prime orders.`
	FORMULA	`A002106[n]-A000019[n]`
	CROSSREFS	`Cf. A000019, A002106.` `Sequence in context: A094897 A019264 A028851 * A140093 A194093 A055314` `Adjacent sequences: A132218 A132219 A132220 * A132222 A132223 A132224`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Aug 14 2007`

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.