id:A089124 - OEIS Search Results

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Largest prime factor of numbers of the form A^2 + 3.

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2, 7, 3, 19, 7, 13, 13, 67, 7, 103, 31, 7, 43, 199, 19, 37, 73, 109, 13, 31, 37, 487, 19, 193, 157, 97, 61, 787, 211, 43, 241, 79, 13, 61, 307, 433, 7, 1447, 127, 229, 421, 31, 463, 277, 13, 163, 79, 769, 601, 2503, 31, 2707, 37, 139, 757, 73, 271, 37, 67, 1201, 19 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`H. Rademacher, Lectures on Elementary Number Theory, pp. 33-38.`
	PROGRAM	`(PARI) largeasqp3(m) = { for(a=1, m, y=a^2 + 3; f = factor(y); v = component(f, 1); v1 = v[length(v)]; print1(v1", ")`
	CROSSREFS	`Cf. A049423.` `Adjacent sequences: A089121 A089122 A089123 this_sequence A089125 A089126 A089127` `Sequence in context: A076992 A138751 A112303 this_sequence A117809 A052091 A090276`
	KEYWORD	`easy,nonn`
	AUTHOR	`Cino Hilliard (hillcino368(AT)gmail.com), Dec 05 2003`

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Last modified May 13 01:46 EDT 2008. Contains 139661 sequences.

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