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A167490 a(n) = Smallest number with binary run length product = n 2
0, 3, 7, 12, 31, 24, 127, 48, 56, 96, 2047, 99, 8191, 384, 224, 195, 131071, 199, 524287, 387, 896, 6144, 8388607, 391, 992, 24576, 455, 1539, 536870911, 775 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(p) = 2^p - 1 for prime p

LINKS

Table of n, a(n) for n=1..30.

EXAMPLE

a(4) = 12, because 12 is the smallest number with a binary run length product of 4.

12 decimal = 1100 binary. Run lengths in binary are 2,2, and 2x2 = 4.

CROSSREFS

Cf. A167489 - Product of run length in binary representation of n

Cf. A167491 - Numbers in this sequence sorted in ascending order

Sequence in context: A193297 A240738 A047068 * A081533 A096856 A108154

Adjacent sequences:  A167487 A167488 A167489 * A167491 A167492 A167493

KEYWORD

nonn

AUTHOR

Andrew Weimholt, Nov 05 2009

STATUS

approved

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Last modified November 21 12:51 EST 2017. Contains 295001 sequences.