id:A064279 - OEIS Search Results

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Number of ordered pairs a,b of elements in the cyclic group C_n such that the subgroup generated by the pair a,b is a proper subgroup of C_n.

+0
3

0, 1, 1, 4, 1, 12, 1, 16, 9, 28, 1, 48, 1, 52, 33, 64, 1, 108, 1, 112, 57, 124, 1, 192, 25, 172, 81, 208, 1, 324, 1, 256, 129, 292, 73, 432, 1, 364, 177, 448, 1, 612, 1, 496, 297, 532, 1, 768, 49, 700, 297, 688, 1, 972, 145, 832, 369, 844, 1, 1296, 1, 964, 513, 1024 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`For a prime p: a(p) = 1.`
	FORMULA	`a(n) = n^2 - A007434(n) = n^2 - J_2(n)`
	CROSSREFS	`A007434, A051953.` `Sequence in context: A097877 A019304 A072869 this_sequence A078710 A080303 A145369` `Adjacent sequences: A064276 A064277 A064278 this_sequence A064280 A064281 A064282`
	KEYWORD	`nonn`
	AUTHOR	`Dan Fux (dan.fux(AT)OpenGaia.com or danfux(AT)OpenGaia.com), Sep 24 2001`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)Eunet.yu), Sep 25 2001`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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