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A093743
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Number of prime pairs below 10^n having a difference of 16.
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2
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0, 0, 0, 33, 339, 2881, 25099, 215804, 1846097, 15888305, 137715130, 1202533145, 10576414202, 93649741408, 834451865580, 7478286927272, 67376249426987, 609996708149171
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OFFSET
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1,4
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LINKS
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EXAMPLE
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a(4) = 33 because there are 33 prime gaps of 16 below 10^3.
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PROG
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(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)
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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a(14)-a(18) from S. Herzog's website added by Giovanni Resta, Aug 14 2018
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STATUS
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approved
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