id:A048618 - OEIS Search Results

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If n=2x, then Mod(C(2x, x), 2x) = 0, i.e. even n divides A001405(n), the central binomial coefficients.

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2, 4, 12, 30, 40, 56, 84, 90, 132, 154, 176, 182, 208, 220, 252, 280, 306, 312, 340, 374, 380, 408, 418, 420, 440, 456, 462, 476, 480, 532, 552, 598, 616, 624, 630, 644, 650, 660, 690, 736, 756, 828, 840, 858, 870, 880, 884, 900, 918, 920, 928, 936, 952, 966 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`While for odd n the central binomial coefficients are divisible by n, this does not necessarily hold for even n.`
	EXAMPLE	`n=30, C(30,15)=155117520=30*5170584; x=15,2x is the 4th term in the sequence`
	CROSSREFS	`A001405, A020475.` `Sequence in context: A096581 A080876 A130135 this_sequence A083554 A059412 A079472` `Adjacent sequences: A048615 A048616 A048617 this_sequence A048619 A048620 A048621`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu)`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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