A076772 - OEIS

%I #6 Mar 31 2012 13:21:55

%S 34,44,46,52,58,62,64,68,74,76,82,86,88,92,94,98,100,102,104,106,112,

%T 114,116,118,122,124,128,130,134,136,142,144,146,148,152,154,156,158,

%U 160,162,164,166,168,170,172,174,176,178,182,184,186,188,190,192,194

%N Even numbers n representable as the sum of 2 coprime odd composites.

%C As the comment in A096076 indicates, 210 is the largest even number not in this sequence. - _Franklin T. Adams-Watters_, Sep 07 2006

%e 34=25+9

%o (PARI) v=vector(5000); vc=1; forstep (n=9,300,2, if (isprime(n),continue, forstep (j=9,300,2,if (gcd(n,j)==1, if (isprime(j),continue,x=n+j; fl=true; for (i=1,vc,if (v[i]==x,fl=false; break)); if (fl==true,v[vc]=x; vc++)))))); print(vc); v=vecsort(vecextract(v,concat("1..",vc-1)))

%Y Cf. A096076.

%K nonn

%O 0,1

%A _Jon Perry_, Nov 14 2002