id:A074936 - OEIS Search Results

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Number of perfect powers between two successive nonprime prime powers.

+0
1

0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 3, 0, 0, 1, 0, 3, 0, 1, 1, 1, 1, 1, 4, 0, 3, 2, 2, 1, 0, 0, 1, 4, 2, 4, 1, 2, 2, 3, 0, 1, 6, 1, 1, 0, 6, 2, 7, 3, 1, 4, 1, 1, 2, 8, 3, 1, 0, 1, 1, 6, 1, 1, 9, 1, 5, 0, 5, 4, 1, 3, 0, 5, 1, 0, 10, 1, 3, 2, 12, 11, 2, 1, 1, 3 (list; graph; listen)

	OFFSET	`1,15`
	LINKS	`Eric Weisstein's World of Mathematics, Perfect Power.` `Eric Weisstein's World of Mathematics, Prime Power.`
	EXAMPLE	`There are three perfect powers with composite roots between A025475(15)=169=13^2 and A025475(15+1)=243=3^5: 196=(27)^2, 216=3^5 and 225=(35)^2; therefore a(15)=3.` `a(16)=0, since there are no perfect powers between A025475(16)=243=3^5 and A025475(16+1)=256=2^8.`
	CROSSREFS	`Cf. A001597, A025475.` `Sequence in context: A167163 A005890 A104515 this_sequence A035655 A036857 A100655` `Adjacent sequences: A074933 A074934 A074935 this_sequence A074937 A074938 A074939`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 10 2002`

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

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