|
Search: id:A153377
|
|
|
| A153377 |
|
Larger of two consecutive prime numbers such that p1*p2*d+d=average of twin prime pairs, d (delta)=p2-p1. |
|
+0
14
|
|
| 7, 11, 43, 47, 103, 107, 127, 229, 337, 383, 571, 653, 739, 757, 877, 977, 1097, 1129, 1171, 1223, 1399, 1511, 2069, 2137, 2203, 2333, 2371, 2411, 2711, 2713, 3719, 4793, 4831, 5023, 5059, 5179, 5483, 5503, 6007, 6029, 6829, 6959, 6971, 7109, 7219, 7481
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
5*7*2+2=72+-1=primes, 7*11*4+4=312+-1=primes,...
|
|
MATHEMATICA
|
lst={}; Do[p1=Prime[n]; p2=Prime[n+1]; d=p2-p1; a=p1*p2*d+d; If[PrimeQ[a-1]&&PrimeQ[a+1], AppendTo[lst, p2]], {n, 7!}]; lst
|
|
CROSSREFS
|
Cf. A099349, A153374, A153375, A153376
Sequence in context: A019416 A138122 A129865 this_sequence A062209 A086828 A117392
Adjacent sequences: A153374 A153375 A153376 this_sequence A153378 A153379 A153380
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Vladimir Orlovsky (4vladimir(AT)gmail.com), Dec 24 2008
|
|
|
Search completed in 0.002 seconds
|
