

A141096


Even numbers not representable as the sum of two coprime nonprime numbers.


3



4, 6, 8, 12, 14, 18, 20, 24, 30, 32, 38, 42, 48, 54, 60, 72, 80, 84, 90, 108, 110, 132, 138, 140, 150, 180
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OFFSET

1,1


COMMENTS

Numbers k such that A141095(k/2) = 0.
180 is the last term.
This sequence is a subsequence of A141098.


LINKS



MATHEMATICA

t = Table[Length[Select[Range[n/2], ! PrimeQ[#] && ! PrimeQ[n  #] && GCD[#, n  #] == 1 &]], {n, 2, 2000, 2}]; Flatten[2*Position[t, 0]] {* T. D. Noe, Dec 05 2013 *)


CROSSREFS



KEYWORD

nonn,fini,full


AUTHOR



STATUS

approved



