cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A076772 Even numbers n representable as the sum of 2 coprime odd composites.

This page as a plain text file.
%I A076772 #6 Mar 31 2012 13:21:55
%S A076772 34,44,46,52,58,62,64,68,74,76,82,86,88,92,94,98,100,102,104,106,112,
%T A076772 114,116,118,122,124,128,130,134,136,142,144,146,148,152,154,156,158,
%U A076772 160,162,164,166,168,170,172,174,176,178,182,184,186,188,190,192,194
%N A076772 Even numbers n representable as the sum of 2 coprime odd composites.
%C A076772 As the comment in A096076 indicates, 210 is the largest even number not in this sequence. - _Franklin T. Adams-Watters_, Sep 07 2006
%e A076772 34=25+9
%o A076772 (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 A076772 Cf. A096076.
%K A076772 nonn
%O A076772 0,1
%A A076772 _Jon Perry_, Nov 14 2002