id:A081218 - OEIS Search Results

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Greatest square-free number not exceeding n-th prime power which is not prime.

+0
3

1, 3, 7, 7, 15, 23, 26, 31, 47, 62, 79, 119, 123, 127, 167, 241, 255, 287, 341, 359, 511, 527, 623, 727, 839, 959, 1023, 1330, 1367, 1679, 1847, 2047, 2186, 2195, 2207, 2399, 2807, 3122, 3478, 3719, 4094, 4487, 4911, 5039, 5327, 6239, 6559, 6857, 6887, 7919 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) = A070321(A025475(n)).`
	CROSSREFS	`Cf. A081217.` `Sequence in context: A060845 A060215 A059478 this_sequence A130003 A098581 A085420` `Adjacent sequences: A081215 A081216 A081217 this_sequence A081219 A081220 A081221`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 10 2003`

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

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