|
Search: id:A064408
|
|
|
| A064408 |
|
Even numbers not the sum of a pair of the greater of the twin primes. |
|
+0
1
|
|
| 2, 4, 6, 8, 16, 22, 28, 30, 34, 40, 42, 46, 52, 54, 58, 60, 64, 70, 72, 76, 82, 84, 88, 90, 94, 96, 98, 100, 102, 106, 112, 118, 120, 124, 126, 130, 132, 136, 138, 142, 148, 150, 154, 160, 162, 166, 168, 172, 174, 178, 180, 184, 190, 192, 196
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
The greater of the twin primes < 200 are 5, 7, 13, 19, 31, 43, 61, 73, 103, 109, 139, 151, 181, 193, 199. 22 is in the above sequence because no combination of any two numbers from the set just enumerated can be summed to make 22.
|
|
MATHEMATICA
|
q = Select[ Range[ 200 ], PrimeQ[ # - 2 ] && PrimeQ[ #2 ] & ]; Complement[ Table[ n, {n, 2, 200, 2} ], Union[ Flatten[ Table[ q[ [ i ] ] + q[ [ j ] ], {i, 1, Length[ q ] }, {j, 1, i} ] ] ] ]
|
|
CROSSREFS
|
Adjacent sequences: A064405 A064406 A064407 this_sequence A064409 A064410 A064411
Sequence in context: A133808 A093109 A070034 this_sequence A100685 A068799 A100778
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 29 2001
|
|
|
Search completed in 0.002 seconds
|
