|
%I #4 Jun 27 2012 21:16:16
%S 1,0,0,1,0,1,1,1,1,1,2,2,3,3,3,4,4,7,6,8,9,8,14,12,18,18,19,26,24,36,
%T 35,42,49,49,68,67,86,93,100,127,126,167,172,200,235,240,313,316,389,
%U 429,464,573,584,732,778,888,1038,1089,1347,1412,1671,1873,2035,2449,2567,3093
%N Number of ways to represent n as the sum of (zero or more) twin primes.
%o (PARI) a(n,t=n)=if(n<3,!n,my(s=n%3==0); forprime(p=5,min(t,n), if(isprime(p+2), s+=a(n-p,p)+a(n-p-2,p+2))); s)
%Y Cf. A212294.
%K nonn
%O 0,11
%A _Charles R Greathouse IV_, Jun 27 2012
|
