id:A126287 - OEIS Search Results

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a(1) = 1, a(2) = 1, a(n) = n * LeastPrimeFactor(n-1) / LeastPrimeFactor(n)

+0
4

1, 1, 2, 6, 2, 15, 2, 28, 6, 15, 2, 66, 2, 91, 10, 24, 2, 153, 2, 190, 14, 33, 2, 276, 10, 65, 18, 42, 2, 435, 2, 496, 22, 51, 14, 90, 2, 703, 26, 60, 2, 861, 2, 946, 30, 69, 2, 1128, 14, 175, 34, 78, 2, 1431, 22, 140, 38, 87, 2, 1770, 2, 1891, 42, 96, 26, 165, 2, 2278, 46, 105 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`a(6) = 6 * LeastPrimeFactor(5) / LeastPrimeFactor(6) = 6 * 5 / 2 = 15`
	CROSSREFS	`Cf. A126286, A126288, A126289, A020639.` `Sequence in context: A079462 A122663 A100892 this_sequence A008556 A096485 A125032` `Adjacent sequences: A126284 A126285 A126286 this_sequence A126288 A126289 A126290`
	KEYWORD	`easy,nonn`
	AUTHOR	`Lior Manor (lior.manor(AT)gmail.com), Dec 25 2006`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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