id:A130178 - OEIS Search Results

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Triangular numbers which are the average of two consecutive primes.

+0
4

6, 15, 21, 45, 105, 120, 231, 300, 351, 465, 741, 780, 861, 1176, 1431, 1485, 3081, 3240, 3321, 3828, 4005, 4278, 5460, 6786, 6903, 7140, 7381, 7503, 7875, 8001, 10731, 11175, 11325, 11781, 12246, 12561, 13530, 13695, 14535, 14706, 17205, 17391 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Intersection of A000217 (triangular numbers) and A024675 (average of two consecutive primes).`
	EXAMPLE	`6-/+1, 15-/+2,..., 300-/+7 are pairs of consecutive primes.`
	CROSSREFS	`Cf. A000217, A024675.` `Sequence in context: A063466 A138109 A072521 this_sequence A100410 A095032 A161925` `Adjacent sequences: A130175 A130176 A130177 this_sequence A130179 A130180 A130181`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), May 14 2007`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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