|
Search: id:A055381
|
|
|
| A055381 |
|
Smallest number such that there are n symmetric (in the gap sense) primes on each side. |
|
+0
3
|
|
| 4, 9, 12, 30, 30, 165, 8021811, 1071065190, 1613902650, 1797595815015
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
The three primes on each side of 12 (13, 17, 19 and 11, 7, 5) are symmetrical with respect to the gaps, so a(3) = 12.
|
|
CROSSREFS
|
Cf. A001223, A055380, A055382.
Sequence in context: A124623 A069082 A083351 this_sequence A032820 A125848 A066588
Adjacent sequences: A055378 A055379 A055380 this_sequence A055382 A055383 A055384
|
|
KEYWORD
|
more,nonn
|
|
AUTHOR
|
Jud McCranie (j.mccranie(AT)comcast.net), Jun 23 2000
|
|
EXTENSIONS
|
a(10) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Mar 09 2008
|
|
|
Search completed in 0.002 seconds
|
