id:A125121 - OEIS Search Results

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Sturdy numbers: n such that in binary notation k*n has at least as many 1-bits as n for all k>0.

+0
8

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 17, 18, 20, 21, 24, 28, 30, 31, 32, 33, 34, 35, 36, 40, 42, 45, 48, 49, 51, 56, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 73, 75, 80, 84, 85, 89, 90, 93, 96, 98, 102, 105, 112, 120, 124, 126, 127, 128, 129, 130, 132, 133, 135, 136 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..2475 (sturdy numbers <= 2^16)` `K. B. Stolarsky, Integers whose multiples have anomalous digital frequencies, Acta Arithmetica, 38 (1980), 117-128.`
	FORMULA	`Complement of A005360. - T. D. Noe (noe(AT)sspectra.com), Jul 17 2008`
	CROSSREFS	`See A143027 for prime sturdy numbers.` `Sequence in context: A164707 A057890 A161604 this_sequence A136490 A129523 A164713` `Adjacent sequences: A125118 A125119 A125120 this_sequence A125122 A125123 A125124`
	KEYWORD	`nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Jul 07 2008`
	EXTENSIONS	`Corrected and extended by T. D. Noe (noe(AT)sspectra.com), Jul 17 2008`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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