id:A063580 - OEIS Search Results

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Smallest power of 4 having just n 5's in its decimal representation.

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1, 4, 8, 37, 38, 34, 72, 54, 71, 89, 99, 136, 105, 134, 151, 172, 206, 159, 202, 214, 156, 304, 274, 278, 253, 281, 268, 358, 326, 375, 389, 345, 424, 429, 460, 488, 449, 484, 466, 521, 531, 544, 568, 556, 638, 540, 590, 547, 508, 677, 606 (list; graph; listen)

	OFFSET	`0,2`
	MATHEMATICA	`a = {}; Do[k = 1; While[ Count[ IntegerDigits[4^k], 5] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a`
	CROSSREFS	`Sequence in context: A149112 A100214 A047710 this_sequence A003049 A098563 A032301` `Adjacent sequences: A063577 A063578 A063579 this_sequence A063581 A063582 A063583`
	KEYWORD	`base,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 10 2001`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

AT&T Labs Research