|
Search: id:A138938
|
|
|
| A138938 |
|
Indices k such that A019326(k)=Phi[k](8) is prime, where Phi is a cyclotomic polynomial. |
|
+0
1
|
|
| 1, 3, 9, 30, 42, 78, 87, 138, 189, 303, 318, 330, 408, 462, 504, 561
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
LINKS
|
Yves Gallot, Cyclotomic polynomials and prime numbers
Index entries for cyclotomic polynomials, values at X
|
|
PROGRAM
|
(PARI) for( i=1, 999, ispseudoprime( polcyclo(i, 8)) & print1( i", ")) /* use ...subst( polcyclo(i), x, 8)... in PARI < 2.4.2 */
|
|
CROSSREFS
|
Cf. A019326, A138920-A138940.
Sequence in context: A091152 A136628 A007472 this_sequence A074003 A078844 A089978
Adjacent sequences: A138935 A138936 A138937 this_sequence A138939 A138940 A138941
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
M. F. Hasler (www.univ-ag.fr/~mhasler), Apr 03 2008
|
|
|
Search completed in 0.002 seconds
|
