id:A144255 - OEIS Search Results

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Semiprimes of the form n^2+1.

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10, 26, 65, 82, 122, 145, 226, 362, 485, 626, 785, 842, 901, 1157, 1226, 1522, 1765, 1937, 2026, 2117, 2305, 2402, 2501, 2602, 2705, 3365, 3482, 3601, 3722, 3845, 4097, 4226, 4762, 5042, 5777, 6085, 6242, 6401, 7226, 7397, 7745, 8465, 9026, 9217, 10001 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Iwaniec proves that there are an infinite number of semiprimes of the form n^2+1.`
	REFERENCES	`Iwaniec, H., Almost primes represented by quadratic polynomials, Invent. math. 47, 1978, 171-188.`
	CROSSREFS	`Cf. A001358` `Sequence in context: A125075 A055710 A134420 this_sequence A072379 A005970 A051966` `Adjacent sequences: A144252 A144253 A144254 this_sequence A144256 A144257 A144258`
	KEYWORD	`nonn`
	AUTHOR	`T. D. Noe (noe(AT)sspectra.com), Sep 16 2008`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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