id:A036382 - OEIS Search Results

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Odd split numbers: have a nontrivial factorization n=ab, LCM[ a,b ]=1, so that g(a)+g(b)<=g(n), where g(x) is binary order of x.

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21, 33, 35, 39, 65, 69, 75, 77, 87, 91, 93, 105, 129, 133, 135, 141, 143, 145, 147, 155, 159, 161, 165, 175, 177, 183, 189, 195, 203, 217, 259, 261, 265, 267, 273, 275, 279, 285, 287, 291, 295, 297, 299, 301, 303, 305, 309, 315, 319, 321, 325, 327, 329, 339 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`All even numbers are split numbers, except that prime powers - here powers of 2 - are by definition excluded.`
	EXAMPLE	`s=39 is a split number since s=39=3*13, LCM[ 3,13 ]=1 and g(3)+g(13)=2+4=g(39).`
	CROSSREFS	`Cf. A029827, A029837, A036378-A036390.` `Sequence in context: A127423 A035137 A075110 this_sequence A119973 A141249 A026068` `Adjacent sequences: A036379 A036380 A036381 this_sequence A036383 A036384 A036385`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu)`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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