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Search: id:A064407
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| A064407 |
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Even numbers not the sum of a pair of the lesser of the twin primes. |
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+0
1
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| 2, 4, 12, 18, 24, 26, 30, 36, 38, 42, 48, 50, 54, 56, 60, 66, 68, 72, 78, 80, 84, 86, 90, 92, 94, 96, 98, 102, 108, 114, 116, 120, 122, 126, 128, 132, 134, 138, 144, 146, 150, 156, 158, 162, 164, 168, 170, 174, 176, 180, 186, 188, 192, 198
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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The lesser of the twin primes < 200 are 3, 5, 11, 17, 29, 41, 59, 71, 101, 107, 137, 149, 179, 191, 197. 24 is in the above sequence because no combination of any two numbers from the set just enumerated can be summed to make 24.
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MATHEMATICA
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p = Select[ Range[ 200 ], PrimeQ[ # ] && PrimeQ[ # + 2 ] & ]; Complement[ Table[ n, {n, 2, 200, 2} ], Union[ Flatten[ Table[ p[ [ i ] ] + p[ [ j ] ], {i, 1, Length[ p ] }, {j, 1, i} ] ] ] ]
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CROSSREFS
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Adjacent sequences: A064404 A064405 A064406 this_sequence A064408 A064409 A064410
Sequence in context: A125885 A067929 A064361 this_sequence A052289 A024872 A129021
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 29 2001
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