A167490 a(n) = Smallest number with binary run length product = n

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

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: A377572 A240738 A047068 * A081533 A096856 A347862

Adjacent sequences: A167487 A167488 A167489 * A167491 A167492 A167493

Keyword

nonn

Author

Andrew Weimholt, Nov 05 2009

Status

approved