id:A087385 - OEIS Search Results

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a(n) = smallest prime == 1 (mod T(n)) where T(n) is the n-th triangular number (A000217).

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2, 7, 7, 11, 31, 43, 29, 37, 181, 331, 67, 79, 547, 211, 241, 137, 307, 2053, 191, 211, 463, 1013, 277, 601, 1301, 3511, 379, 2437, 1741, 1861, 1489, 2113, 1123, 2381, 631, 1999, 4219, 1483, 2341, 821, 1723, 3613, 947, 991, 6211, 12973, 1129, 3529, 7351 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`The prime corresponding to the triangular number 21 is 43.`
	CROSSREFS	`Sequence in context: A068386 A021040 A003061 this_sequence A090521 A090523 A011416` `Adjacent sequences: A087382 A087383 A087384 this_sequence A087386 A087387 A087388`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 09 2003`
	EXTENSIONS	`More terms from Sam Alexander (amnalexander(AT)yahoo.com), Dec 28 2003`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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