id:A063609 - OEIS Search Results

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Smallest power of 7 having just n 3's in its decimal representation.

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1

1, 12, 3, 17, 16, 46, 27, 42, 45, 68, 91, 105, 88, 123, 111, 101, 137, 143, 151, 127, 167, 202, 217, 193, 218, 246, 238, 207, 253, 275, 235, 251, 344, 279, 347, 335, 283, 323, 378, 361, 418, 389, 421, 384, 385, 454, 471, 436, 410, 544, 522 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`a = {}; Do[k = 1; While[ Count[ IntegerDigits[7^k], 3] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a`
	CROSSREFS	`Sequence in context: A129197 A070604 A127146 this_sequence A040139 A112033 A130895` `Adjacent sequences: A063606 A063607 A063608 this_sequence A063610 A063611 A063612`
	KEYWORD	`base,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 10 2001`

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Last modified September 7 15:23 EDT 2008. Contains 143483 sequences.

AT&T Labs Research