id:A125602 - OEIS Search Results

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Prime centered triangular numbers.

+0
2

19, 31, 109, 199, 409, 571, 631, 829, 1489, 1999, 2341, 2971, 3529, 4621, 4789, 7039, 7669, 8779, 9721, 10459, 10711, 13681, 14851, 16069, 16381, 17659, 20011, 20359, 23251, 25939, 27541, 29191, 29611, 31321, 34429, 36739, 40099, 40591, 42589 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Or prime terms in A005448, or primes of the form 3n(n-1)/2 + 1.`
	CROSSREFS	`Cf. A005448, A125603.` `Sequence in context: A032743 A106861 A107168 this_sequence A139847 A087764 A133151` `Adjacent sequences: A125599 A125600 A125601 this_sequence A125603 A125604 A125605`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)gmail.com), Nov 27 2006`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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