|
Search: id:A091305
|
|
|
| A091305 |
|
Primes of the form p*q - p - q, where p and q are primes. |
|
+0
1
|
|
| 3, 5, 7, 11, 17, 19, 23, 29, 31, 41, 43, 47, 59, 71, 79, 83, 101, 103, 107, 131, 137, 139, 149, 163, 167, 179, 191, 197, 199, 211, 223, 227, 239, 251, 263, 269, 271, 281, 311, 331, 347, 359, 379, 383, 419, 431, 443, 461, 463, 467, 479, 491, 499, 503, 521, 523
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Some primes have no unique representation (besides of symmetry in p,q!), e.g. 11 with (p,q)=(2,13) and (3,7).
|
|
LINKS
|
T. D. Noe, Table of n, a(n) for n=1..1000
|
|
EXAMPLE
|
31 is a member with p=3, q=17.
|
|
CROSSREFS
|
Primes of the form p*q + p + q: A066938. Primes of the form p*q + p - q: A091301.
Adjacent sequences: A091302 A091303 A091304 this_sequence A091306 A091307 A091308
Sequence in context: A094615 A082373 A116959 this_sequence A085498 A128926 A048184
|
|
KEYWORD
|
easy,nice,nonn
|
|
AUTHOR
|
Zak Seidov (zakseidov(AT)yahoo.com), Feb 21 2004
|
|
|
Search completed in 0.002 seconds
|
