|
Search: id:A136244
|
|
|
| A136244 |
|
Least positive integer k such that 2k can be expressed as the sum of two primes in exactly n ways. |
|
+0
1
|
| |
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
It appears that 2,3,4,6 are the only numbers k such that 2k can be expressed as the sum of two primes in only one way.
|
|
EXAMPLE
|
a(3) = 11: 22 = 3 +11 = 5 +17 = 11 +11. i.e. 22 is the least number which could be expressed as the sum of two prime numbers in exactly three ways.
|
|
CROSSREFS
|
Sequence in context: A080165 A063535 A091653 this_sequence A118754 A067775 A138644
Adjacent sequences: A136241 A136242 A136243 this_sequence A136245 A136246 A136247
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
K.B. Subramaniam (shunya_1950(AT)yahoo.co.in), Dec 24 2007
|
|
|
Search completed in 0.002 seconds
|
