id:A131634 - OEIS Search Results

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Nth even semiprime minus n-th odd semiprime.

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-5, -9, -11, -11, -11, -9, -5, -11, -5, 3, 5, 9, 13, 9, 9, 19, 27, 29, 39, 31, 31, 39, 45, 55, 65, 69, 65, 71, 73, 71, 95, 101, 105, 101, 115, 117, 127, 125, 131, 141, 149, 149, 167, 169, 175, 177, 187, 209, 207, 209, 213, 219, 217, 235, 227, 237, 247, 247, 255, 261, 263, 281, 305, 303, 305, 311, 335, 345, 359, 359, 365, 363 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Starting with n=10, n-th even semiprime > n-th odd semiprime. Sequence is not monotonic, with general increasing trend.`
	FORMULA	`a(n)=A100484(n)-A046315(n).`
	CROSSREFS	`Cf. A046315, A100484.` `Sequence in context: A136318 A117771 A119124 this_sequence A049049 A118358 A101731` `Adjacent sequences: A131631 A131632 A131633 this_sequence A131635 A131636 A131637`
	KEYWORD	`sign`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Oct 02 2007`

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.

AT&T Labs Research