id:A102690 - OEIS Search Results

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Number of n-expodigital numbers (i.e. numbers m such that m^n has exactly n digits).

+0
2

10, 6, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(n)=10 - A102691(n).`
	EXAMPLE	`a(6)=3 because only the 3 numbers 7,8 and 9 are 6-expodigital:7^6=117649; 8^=262144; 9^6=531441.`
	CROSSREFS	`Cf. A102691.` `Sequence in context: A094260 A010171 A006518 this_sequence A076366 A105155 A072930` `Adjacent sequences: A102687 A102688 A102689 this_sequence A102691 A102692 A102693`
	KEYWORD	`fini,full,nonn`
	AUTHOR	`Lekraj Beedassy (blekraj(AT)yahoo.com), Jan 21 2005`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.