id:A128302 - OEIS Search Results

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The indices of cubes (of primes) in the 3-almost primes.

+0
3

1, 5, 30, 82, 328, 551, 1243, 1763, 3112, 6276, 7619, 12972, 17615, 20322, 26514, 37977, 52220, 57703, 76200, 90701, 98470, 124541, 144229, 177395, 229275, 258410, 273908, 306750, 324149, 360724, 510225, 559384, 638657, 666743, 819645, 852588 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A014612(a(n)) = A030078(n) = A000040(n)^3.`
	EXAMPLE	`a(4) = 82 as 343=7^3=prime(4)^3, the fourth cube in the 3-almost primes, is the eighty-second 3-almost prime.`
	CROSSREFS	`Cf. A128301, A014612, A030078, A128303.` `Sequence in context: A044463 A152745 A164015 this_sequence A071252 A030506 A062990` `Adjacent sequences: A128299 A128300 A128301 this_sequence A128303 A128304 A128305`
	KEYWORD	`nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Feb 25 2007`

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

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