id:A112666 - OEIS Search Results

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Semiprimes n such that 3*n + 4 is a square.

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4, 15, 39, 55, 95, 119, 319, 407, 559, 799, 1007, 1159, 1679, 2407, 2759, 3007, 3959, 5207, 6439, 8639, 10207, 10679, 10919, 13199, 16279, 18407, 19039, 23407, 24119, 31007, 32239, 33919, 36079, 50959, 52007, 58519, 66007, 67799, 69007, 73319 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`fQ[n_] := Plus @@ Last /@ FactorInteger@n == 2 && IntegerQ@Sqrt[3n + 4]; Select[ Range@100000, fQ[ # ] &] (* Robert G. Wilson v *)`
	CROSSREFS	`Sequence in context: A106199 A113289 A033813 this_sequence A014629 A062486 A053698` `Adjacent sequences: A112663 A112664 A112665 this_sequence A112667 A112668 A112669`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Dec 29 2005`
	EXTENSIONS	`More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Dec 30 2005`

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

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