id:A080170 - OEIS Search Results

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Numbers n such that GCD(C(2*n,n), C(3*n,n), C(4*n,n) ..., C((n+1)*n,n) ) = 1.

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29, 59, 69, 83, 89, 104, 119, 125, 131, 139, 153, 164, 167, 179, 181, 194, 197, 209, 219, 230, 233, 251, 259, 263, 272, 279, 285, 305, 307, 311, 314, 329, 335, 339, 356, 359, 363, 373, 379, 384, 389, 395, 398, 407, 417, 419, 428, 439, 441, 454, 455, 461 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A051283(n-1) - 1 (conjectured). - Ralf Stephan, Feb 20 2004`
	MATHEMATICA	`Select[Range[500], GCD@@Table[Binomial[k*#, # ], {k, 2, #+1}]==1&]`
	CROSSREFS	`Sequence in context: A004942 A033904 A156639 this_sequence A078848 A055784 A083821` `Adjacent sequences: A080167 A080168 A080169 this_sequence A080171 A080172 A080173`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 31 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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