id:A063570 - OEIS Search Results

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Smallest positive power of 7 having n in its decimal representation.

+0
2

4, 4, 4, 3, 2, 7, 5, 1, 5, 2, 13, 6, 12, 12, 19, 15, 5, 6, 19, 11, 12, 22, 14, 7, 4, 30, 11, 23, 10, 16, 14, 19, 11, 16, 3, 7, 9, 19, 12, 17, 4, 12, 27, 3, 18, 21, 32, 10, 8, 2, 15, 17, 10, 9, 7, 21, 15, 8, 21, 18, 9 (list; graph; listen)

	OFFSET	`0,1`
	MATHEMATICA	`a = {}; Do[k = 1; While[ StringPosition[ ToString[7^k], ToString[n] ] == {}, k++ ]; a = Append[a, k], {n, 0, 60} ]; a`
	CROSSREFS	`Essentially the same as A062524.` `Adjacent sequences: A063567 A063568 A063569 this_sequence A063571 A063572 A063573` `Sequence in context: A016708 A105724 A063448 this_sequence A023977 A073259 A071907`
	KEYWORD	`base,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 10 2001`

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.

AT&T Labs Research