|
Search: id:A014573
|
|
|
| A014573 |
|
Smallest k such that phi(x) = k has exactly n solutions. |
|
+0
7
|
|
| 3, 0, 1, 2, 4, 8, 12, 32, 36, 40, 24, 48, 160, 396, 2268, 704, 312, 72, 336, 216, 936, 144, 624, 1056, 1760, 360, 2560, 384, 288, 1320, 3696, 240, 768, 9000, 432, 7128, 4200, 480, 576, 1296, 1200, 15936, 3312, 3072, 3240, 864, 3120, 7344, 3888, 720, 1680
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
COMMENT
|
Carmichael conjectured that no term exists for n=1.
|
|
REFERENCES
|
M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 840.
|
|
LINKS
|
M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, December 1972 [alternative scanned copy].
Eric Weisstein's World of Mathematics, Carmichael's conjecture
|
|
CROSSREFS
|
Cf. A000010. Essentially same as A007374, which is the main entry for this sequence.
Sequence in context: A129555 A136748 A049765 this_sequence A067166 A125209 A071818
Adjacent sequences: A014570 A014571 A014572 this_sequence A014574 A014575 A014576
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Eric Weisstein (eric(AT)weisstein.com)
|
|
|
Search completed in 0.002 seconds
|
