id:A139846 - OEIS Search Results

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Primes of the form 5x^2+21y^2.

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5, 41, 89, 101, 269, 461, 509, 521, 761, 881, 929, 941, 1049, 1109, 1181, 1301, 1361, 1601, 1721, 1889, 1949, 2141, 2309, 2441, 2609, 2621, 2729, 2789, 2861, 3041, 3209, 3449, 3461, 3701, 3821, 3881, 3989, 4049, 4241, 4289, 4409, 4721, 4889 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Discriminant=-420. See A139827 for more information.`
	FORMULA	`The primes are congruent to {5, 41, 89, 101, 209, 269, 341} (mod 420).`
	CROSSREFS	`Adjacent sequences: A139843 A139844 A139845 this_sequence A139847 A139848 A139849` `Sequence in context: A106963 A031415 A031917 this_sequence A142101 A102265 A128347`
	KEYWORD	`nonn,easy`
	AUTHOR	`T. D. Noe (noe(AT)sspectra.com), May 02 2008`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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