id:A063606 - OEIS Search Results

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Smallest power of 7 having just n 0's in its decimal representation.

+0
1

1, 4, 9, 13, 25, 55, 39, 41, 45, 70, 69, 65, 75, 107, 109, 134, 167, 142, 156, 196, 157, 205, 214, 180, 213, 183, 162, 251, 263, 276, 268, 290, 306, 295, 369, 313, 332, 293, 353, 340, 357, 387, 367, 476, 334, 509, 363, 474, 454, 488, 453 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`a = {}; Do[k = 1; While[ Count[ IntegerDigits[7^k], 0] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a`
	CROSSREFS	`Sequence in context: A098004 A056227 A048261 this_sequence A033287 A041323 A041028` `Adjacent sequences: A063603 A063604 A063605 this_sequence A063607 A063608 A063609`
	KEYWORD	`base,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 10 2001`

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Last modified December 19 21:04 EST 2009. Contains 171054 sequences.

AT&T Labs Research