|
| |
|
|
A055380
|
|
Smallest prime such that there are n symmetric (in the gap sense) primes on each side.
|
|
9
| | |
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| 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: A083976 A013834 A191940 * A193148 A165711 A167369
Adjacent sequences: A055377 A055378 A055379 * A055381 A055382 A055383
|
|
|
KEYWORD
| more,nonn
|
|
|
AUTHOR
| Jud McCranie (JudMcCranie(AT)ugaalum.uga.edu), Jun 23 2000
|
|
|
EXTENSIONS
| a(6) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Mar 09 2008
|
| |
|
|
