id:A133363 - OEIS Search Results

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Numbers n such that 1+Sum[3k, k=1,2,...,n] is prime.

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3, 4, 8, 11, 16, 19, 20, 23, 31, 36, 39, 44, 48, 55, 56, 68, 71, 76, 80, 83, 84, 95, 99, 103, 104, 108, 115, 116, 124, 131, 135, 139, 140, 144, 151, 156, 163, 164, 168, 171, 180, 184, 188, 191, 195, 203, 204, 215, 216, 219, 220, 223, 244, 256, 263, 268, 271, 276 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`It appears that the first differences of this sequence are never of the form 4k+2.`
	CROSSREFS	`Cf. A067196, A134460.` `Adjacent sequences: A133360 A133361 A133362 this_sequence A133364 A133365 A133366` `Sequence in context: A113294 A022888 A051207 this_sequence A099108 A001994 A084421`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Oct 26 2007`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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