|
Search: id:A051635
|
|
|
| A051635 |
|
Weak primes: p(n)<(p(n-1)+p(n+1))/2. |
|
+0
32
|
|
| 3, 7, 13, 19, 23, 31, 43, 47, 61, 73, 83, 89, 103, 109, 113, 131, 139, 151, 167, 181, 193, 199, 229, 233, 241, 271, 283, 293, 313, 317, 337, 349, 353, 359, 383, 389, 401, 409, 421, 433, 443, 449, 463, 467, 491, 503, 509, 523, 547, 571, 577, 601, 619, 643, 647
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
REFERENCES
|
A. Murthy, Smarandache Notions Journal, Vol. 11 N. 1-2-3 Spring 2000
|
|
LINKS
|
T. D. Noe, Table of n, a(n) for n=1..1000
M. L. Perez et al., eds., Smarandache Notions Journal
|
|
EXAMPLE
|
7 belongs to the sequence because 7<(5+11)/2
|
|
MATHEMATICA
|
Transpose[Select[Partition[Prime[Range[10^2]], 3, 1], #[[2]]<(#[[1]]+#[[3]])/2 &]][[2]] (from Vladimir Orlovsky (4vladimir(AT)gmail.com), May 01 2008)
|
|
CROSSREFS
|
Cf. A006562, A051634.
Sequence in context: A105399 A133261 A113911 this_sequence A136009 A056531 A144917
Adjacent sequences: A051632 A051633 A051634 this_sequence A051636 A051637 A051638
|
|
KEYWORD
|
nice,nonn,easy
|
|
AUTHOR
|
Felice Russo (felice.russo(AT)katamail.com), Nov 15 1999
|
|
EXTENSIONS
|
More terms from James A. Sellers (sellersj(AT)math.psu.edu)
|
|
|
Search completed in 0.002 seconds
|
