id:A080103 - OEIS Search Results

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Greatest prime power in all composite numbers between n-th prime and next prime, a(n)=1 if no such prime power exists.

+0
3

4, 1, 9, 1, 16, 1, 1, 27, 1, 32, 1, 1, 1, 49, 1, 1, 64, 1, 1, 1, 81, 1, 1, 1, 1, 1, 1, 1, 125, 128, 1, 1, 1, 1, 1, 1, 1, 169, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 243, 256, 1, 1, 1, 1, 1, 1, 289, 1, 1, 1, 1, 1, 1, 343, 1, 1, 1, 361, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; listen)

	OFFSET	`2,1`
	EXAMPLE	`There are two prime powers between 7=A000040(4) and 11=A000040(5): 8=2^3 and 9=3^2, therefore a(4)=9, A080102(4)=8 and A080101(4)=2.`
	CROSSREFS	`Cf. A080101, A080102, A025475, A000961.` `Sequence in context: A143469 A123726 A138675 this_sequence A091419 A085383 A153265` `Adjacent sequences: A080100 A080101 A080102 this_sequence A080104 A080105 A080106`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 28 2003`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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