|
Search: id:A055380
|
|
|
| A055380 |
|
Smallest prime such that there are n symmetric (in the gap sense) primes on each side. |
|
+0
9
|
|
| 5, 18731, 683783, 98303927, 60335249959, 1169769749219
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Least n-tuply balanced primes: primes which are averages of both their immediate neighbor, their second neighbors, their third neighbors, ... and their n-th neighbors.
|
|
EXAMPLE
|
The primes after 18731 are 18743 and 18749 - gaps of 12 and 6 and the primes before 18731 are 18719 and 18713 - gaps of 12 and 6 (in reverse), so 18731 is in the sequence.
|
|
CROSSREFS
|
Cf. A001223, A055381, A055382, A006562, A051795, A081415, A096710.
Sequence in context: A089989 A083976 A013834 this_sequence A165711 A167369 A050816
Adjacent sequences: A055377 A055378 A055379 this_sequence A055381 A055382 A055383
|
|
KEYWORD
|
more,nonn
|
|
AUTHOR
|
Jud McCranie (j.mccranie(AT)comcast.net), Jun 23 2000
|
|
EXTENSIONS
|
a(6) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Mar 09 2008
|
|
|
Search completed in 0.002 seconds
|
