Search: id:A054265
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%I A054265
%S A054265 0,4,6,27,12,45,18,63,130,30,170,117,42,135,250,280,60,320,207,72,380,
%T A054265 243,430,651,297,102,315,108,333,1560,387,670,138,1296,150,770,800,495,
%U A054265 850,880,180,1674,192,585,198,2255,2387,675,228,693,1180,240,2214,1270
%N A054265 Sum of composite numbers between successive primes.
%F A054265 a(n)=(p(n+1)+p(n))*(p(n+1)-p(n)-1)/2, where p(n) is n-th prime and p(1)=2. 
               - Zak Seidov (zakseidov(AT)yahoo.com), Sep 12 2002
%e A054265 Between 7 and 11 we have 8 + 9 + 10 which is a(4)=27.
%Y A054265 Cf. A046933, A054264, A054266, A054267, A054268.
%Y A054265 Sequence in context: A123873 A099941 A074120 this_sequence A105409 A109934 
               A068321
%Y A054265 Adjacent sequences: A054262 A054263 A054264 this_sequence A054266 A054267 
               A054268
%K A054265 nonn
%O A054265 1,2
%A A054265 Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 15 2000.

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