id:A067563 - OEIS Search Results

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Product of n-th prime number and n-th composite number.

+0
3

8, 18, 40, 63, 110, 156, 238, 285, 368, 522, 620, 777, 902, 1032, 1175, 1378, 1593, 1708, 2010, 2272, 2409, 2686, 2905, 3204, 3686, 3939, 4120, 4494, 4796, 5085, 5842, 6288, 6713, 6950, 7599, 7852, 8478, 8965, 9352, 9861, 10382, 10860, 11842, 12159 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = prime(n) * composite(n).`
	EXAMPLE	`E.g. a(4)=63 because the fourth prime is 7 and the fourth composite is 9.`
	CROSSREFS	`Cf. A000040, A002808, A064799.` `Adjacent sequences: A067560 A067561 A067562 this_sequence A067564 A067565 A067566` `Sequence in context: A129958 A082227 A134062 this_sequence A123134 A096283 A082194`
	KEYWORD	`easy,nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Jan 29 2002`

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Last modified October 15 20:12 EDT 2008. Contains 145099 sequences.

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