id:A129521 - OEIS Search Results

Search: id:A129521

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Numbers of the form p*q, p and q prime with q=2*p-1.

+0
4

6, 15, 91, 703, 1891, 2701, 12403, 18721, 38503, 49141, 79003, 88831, 104653, 146611, 188191, 218791, 226801, 269011, 286903, 385003, 497503, 597871, 665281, 721801, 736291, 765703, 873181, 954271, 1056331, 1314631, 1373653, 1537381 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(n) = A005382(n)*A005383(n);` `subsequence of A006881 and of A129510.`
	CROSSREFS	`Sequence in context: A013229 A013225 A138547 this_sequence A029765 A068128 A013222` `Adjacent sequences: A129518 A129519 A129520 this_sequence A129522 A129523 A129524`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 19 2007`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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