id:A067543 - OEIS Search Results

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Numbers n such that phi(n*(n+1)*(n+2)*(n+3)/4!)/phi(n*(n+1)*(n+2)/3!) is not an integer where phi(n)=A000010(n) is the Euler totient function.

+0
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6, 8, 16, 24, 40, 46, 54, 56, 64, 78, 80, 104, 118, 126, 128, 136, 144, 160, 176, 198, 203, 208, 224, 240, 248, 280, 304, 328, 344, 358, 360, 376, 414, 416, 440, 464, 486, 488, 496, 520, 526, 544, 560, 568, 584, 616, 630, 640, 656, 680, 688, 726, 736, 784 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Sequence in context: A100646 A074838 A048228 this_sequence A006583 A011989 A127400` `Adjacent sequences: A067540 A067541 A067542 this_sequence A067544 A067545 A067546`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 28 2002`

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

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