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A065879 Lowest positive number that is n times the number of 1's in its binary expansion, or 0 if no such number exists. 2
1, 2, 6, 4, 10, 12, 21, 8, 18, 20, 55, 24, 0, 42, 60, 16, 34, 36, 0, 40, 126, 110, 69, 48, 0, 0, 81, 84, 116, 120, 155, 32, 66, 68, 0, 72, 185, 0, 156, 80, 205, 252, 172, 220, 180, 138, 0, 96, 0, 0, 204, 0, 212, 162, 0, 168, 228, 232, 295, 240, 366, 310, 378, 64, 130 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

EXAMPLE

a(23) is 69 since 69 is written in binary as 1000101, 69/(1+0+0+0+1+0+1)=23 and there is no lower possibility (neither 23 nor 46 are divisible by their number of binary 1's).

CROSSREFS

A003634 is the base 10 equivalent. Cf. A000120, A049445, A058898, A065413, A065878, A065880.

Sequence in context: A113571 A119018 A094748 * A065880 A090546 A059909

Adjacent sequences:  A065876 A065877 A065878 * A065880 A065881 A065882

KEYWORD

base,nonn

AUTHOR

Henry Bottomley (se16(AT)btinternet.com), Nov 26 2001

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Last modified February 17 07:41 EST 2012. Contains 205998 sequences.