%I A093737
%S A093737 0,7,40,202,1215,8143,58621,440257,3424679
%N A093737 Number of prime pairs below 10^n having a difference of 4.
%F A093737 Count prime pairs below 10^n having a difference of 4
%e A093737 a(2)=7 because there are 7 prime gaps of 4 below 10^2
%o A093737 UBASIC: 20 N=1:dim T(34); 30 A=nxtprm(N); 40 N=A; 50 B=nxtprm(N); 60 
               D=B-A; 70 for x=2 to 34 step 2; 80 if D=X and B<10^2+1 then T(X)=T(X)+1; 
               90 next X; 100 if B>10^2+1 then 140; 110 B=A; 120 N=N+1; 130 goto 
               30; 140 for x=2 to 34 step 2; 150 print T(X);, 160 next (This program 
               simultaneously finds values from 2 to 34 -- if gap=2 add 1-- adjust 
               lines 80 and 100 for desired 10^n)
%Y A093737 Cf. A007508 A093738.
%Y A093737 Sequence in context: A164083 A096200 A055282 this_sequence A081039 A083327 
               A026716
%Y A093737 Adjacent sequences: A093734 A093735 A093736 this_sequence A093738 A093739 
               A093740
%K A093737 easy,nonn
%O A093737 1,2
%A A093737 Enoch Haga (Enokh(AT)comcast.net), Apr 15 2004