Search: id:A108183
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%I A108183
%S A108183 19,29,43,47,59,67,73,127,151,167,173,233,283,313,317,461,521,541,593,
%T A108183 653,701,719,727,787,839,907,967,1249,1409,1439,1471,1549,1601,1831,
%U A108183 1867,1873,1913,1993,2029,2083,2089,2287,2311,2351,2393,2579,2593,2693
%N A108183 Primes equal to the sum of two successive semiprimes.
%C A108183 Primes p such that p = sum of n-th and (n+1)-st semiprimes for some n.
%C A108183 Primes appearing in A109404.
%e A108183 19 = sp(3) + sp(4) = 9 + 10 where sp(n) = n-th semiprime.
%e A108183 29 is a member because 2*7 + 3*5 = 29.
%e A108183 13 is not a member because although 2*2 + 3*3 = 13, 4 and 9 are not successive 
               semiprimes.
%t A108183 Select[ Plus @@@ Partition[ Select[ Range[1250], Plus @@ Last /@ FactorInteger[ 
               # ] == 2 &], 2, 1], PrimeQ[ # ] &] (from Robert G. Wilson v (rgwv(AT)rgwv.com), 
               Jun 14 2005)
%Y A108183 Cf. A109404.
%Y A108183 Sequence in context: A133765 A158846 A157026 this_sequence A157483 A096218 
               A100590
%Y A108183 Adjacent sequences: A108180 A108181 A108182 this_sequence A108184 A108185 
               A108186
%K A108183 easy,nonn
%O A108183 1,1
%A A108183 Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Jun 14 2005
%E A108183 Corrected and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 
               14 2005
%E A108183 Edited by N. J. A. Sloane (njas(AT)research.att.com), May 03 2007

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