|
Search: id:A124684
|
|
|
| A124684 |
|
(Product of successive primes minus 2) divided by 5 is prime. |
|
+0
1
|
|
| 229, 1153, 14149, 15013, 189733, 214657, 253573, 350593, 514561, 522289, 725041, 853669, 1304581, 1453681, 2027569, 2183281, 2212453, 2469637, 3238513, 4166017, 4331941, 4467013, 5234689, 5510371, 5992933, 6102913, 8100097, 8130673
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
These numbers times 5 also form simiprimes.
|
|
EXAMPLE
|
31*37 = 1147, 1147-2 = 1145, 1145/5 = 229 the second entry.
|
|
PROGRAM
|
(PARI) g(n, p) = { for(x=1, n, y=prime(x)*prime(x+1)-2; if(y%p==0, if(isprime(y/p), print1(y/p", ")))) }
|
|
CROSSREFS
|
Cf. A123921.
Adjacent sequences: A124681 A124682 A124683 this_sequence A124685 A124686 A124687
Sequence in context: A094612 A112847 A139512 this_sequence A028452 A072020 A122269
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Cino Hilliard (hillcino368(AT)hotmail.com), Dec 27 2006
|
|
|
Search completed in 0.002 seconds
|
