OFFSET
1,1
COMMENTS
k-1 or k+1 or both have sums of prime factors at least twice the sum of prime factors of k.
MATHEMATICA
sop[n_] := If[n<2, 0, Total[Times @@@ FactorInteger@ n]]; Select[ Range[2, 150], (s = 2 sop[#]; sop[#+1] >= s || sop[#-1] >= s) &] (* Giovanni Resta, Oct 27 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert Bilinski, Oct 26 2019
STATUS
approved