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A067543 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
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; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

CROSSREFS

Sequence in context: A315939 A315940 A048228 * A006583 A011989 A270821

Adjacent sequences:  A067540 A067541 A067542 * A067544 A067545 A067546

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Jan 28 2002

STATUS

approved

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Last modified September 16 08:29 EDT 2021. Contains 347469 sequences. (Running on oeis4.)