id:A119382 - OEIS Search Results

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A119382

Indices j of prime numbers p(j) such that (p(j-1) + p(j+2)) / p(j) = 2.

+0
2

12, 19, 59, 92, 112, 115, 140, 211, 233, 253, 261, 268, 276, 285, 291, 294, 301, 322, 352, 358, 369, 389, 407, 417, 473, 500, 542, 598, 612, 624, 714, 718, 723, 742, 819, 933, 939, 994, 998, 1016, 1098, 1119, 1263, 1299, 1312, 1400, 1414, 1418, 1422, 1449 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(1)=12 because the 11th prime 31 plus the 14th prime 43 divided by the 12th prime 37 equals 2.`
	MATHEMATICA	`Select[Range[2, 1500], (Prime[ # - 1] + Prime[ # + 2])/(Prime[ # ]) == 2 &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jul 26 2006`
	CROSSREFS	`Sequence in context: A117539 A136770 A155574 this_sequence A166671 A104198 A093314` `Adjacent sequences: A119379 A119380 A119381 this_sequence A119383 A119384 A119385`
	KEYWORD	`nonn`
	AUTHOR	`Axel Harvey (ax(AT)hirsig.ca), Jul 25 2006`
	EXTENSIONS	`More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jul 26 2006`

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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.

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