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A104373
Numbers m such that (A104350(m)-1, A104350(m)+1) is a twin prime pair.
2
3, 4, 5, 6, 9, 11
OFFSET
1,1
COMMENTS
No more terms < 2000. - David Wasserman, Apr 24 2008
a(7) > 5000, if it exists. - Amiram Eldar, Apr 08 2024
EXAMPLE
a(5)=9: A104350(9) = 2*3*2*5*3*7*2*3 = 7560, A000040(959) = 7559 = 7560-1, A000040(960) = 7561 = 7560+1.
MATHEMATICA
Position[FoldList[Times, Array[FactorInteger[#][[-1, 1]] &, 100]], _?(PrimeQ[# - 1] && PrimeQ[# + 1] &)] // Flatten (* Amiram Eldar, Apr 08 2024 *)
KEYWORD
nonn,more
AUTHOR
Reinhard Zumkeller, Mar 06 2005
STATUS
approved