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 A107685 Swap the order of primes in twin prime pairs. Also, from 5th term (which is 7) on, the primes of A107323. 0

%I

%S 2,3,5,3,7,5,13,11,19,17,31,29,43,41,61,59,73,71,103,101,109,107,139,

%T 137,151,149,181,179,193,191,199,197,229,227,241,239,271,269,283,281,

%U 313,311,349,347,421,419,433,431,463,461,523,521,571,569,601,599,619

%N Swap the order of primes in twin prime pairs. Also, from 5th term (which is 7) on, the primes of A107323.

%C Included here as a twin prime pair is (2,3).

%p c:=0: for n from 3 to 1000 do if isprime(n)=true and isprime(n+2)=true then c:=c+2: a[c-1]:=n+2: a[c]:=n: fi od: 2,3,seq(a[n],n=1..c); # _Emeric Deutsch_, Jun 19 2005

%Y Cf. A107323, A107472.

%K nonn

%O 1,1

%A _Leroy Quet_, Jun 16 2005

%E More terms from _Emeric Deutsch_, Jun 19 2005

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Last modified June 5 09:57 EDT 2020. Contains 334835 sequences. (Running on oeis4.)