|
Search: id:A046872
|
|
| |
|
| 7, 47, 191, 239, 307, 463, 499, 701, 743, 787, 853, 1087, 1123, 1301, 1487, 1553, 1567, 1823, 2309, 2621, 2843, 2903, 3083, 3203, 3319, 3323, 3359, 3373, 3541, 3583, 3557, 3617, 3659, 3671, 3727, 3769, 3863, 3947, 4217, 4327, 4373, 4391
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Call the numbers in A008849 F-numbers; then a prime p is called an F-prime if there exists a squarefree F-number q_1*q_2*...*q_r*p with q_1 < q_2 < ... < q_r < p in which the q_i's are primes but not F-primes.
|
|
REFERENCES
|
I. Kaplansky, The challenges of Fermat, Wallis and Ozanam (and several related challenges): I. Fermat's first challenge, Preprint, 2002.
|
|
CROSSREFS
|
Cf. A008849.
Sequence in context: A009219 A142185 A158914 this_sequence A152988 A009202 A093112
Adjacent sequences: A046869 A046870 A046871 this_sequence A046873 A046874 A046875
|
|
KEYWORD
|
nonn,nice
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com), Oct 05 2002
|
|
|
Search completed in 0.002 seconds
|
