id:A063607 - OEIS Search Results

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Smallest power of 7 having just n 1's in its decimal representation.

+0
1

1, 4, 6, 12, 19, 34, 24, 37, 38, 57, 52, 92, 96, 88, 116, 142, 133, 156, 108, 147, 115, 158, 209, 190, 180, 266, 200, 270, 240, 262, 263, 208, 279, 366, 339, 304, 352, 331, 406, 316, 407, 385, 396, 434, 437, 376, 386, 414, 470, 450, 551 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`a = {}; Do[k = 1; While[ Count[ IntegerDigits[7^k], 1] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a`
	CROSSREFS	`Sequence in context: A048641 A023599 A087881 this_sequence A045956 A057339 A160856` `Adjacent sequences: A063604 A063605 A063606 this_sequence A063608 A063609 A063610`
	KEYWORD	`base,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 10 2001`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research