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A279103 Number of Goldbach partitions (p,q) of 2n such that there exists a prime r in p < r < q that does not appear as a part in any Goldbach partition of p+q = 2n. 3

%I #10 Jan 14 2018 17:03:04

%S 0,0,0,0,0,0,1,2,0,2,2,0,2,2,0,2,3,2,1,3,3,3,3,5,4,2,5,3,3,1,2,5,6,1,

%T 5,6,4,5,6,4,4,5,4,4,8,4,4,7,3,5,8,5,4,8,6,6,10,6,5,10,3,5,10,2,7,9,5,

%U 5,7,7,7,10,5,5,12,3,8,11,4,8,8,5,5,13,9,5,11,7

%N Number of Goldbach partitions (p,q) of 2n such that there exists a prime r in p < r < q that does not appear as a part in any Goldbach partition of p+q = 2n.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/GoldbachPartition.html">Goldbach Partition</a>

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Goldbach%27s_conjecture">Goldbach's conjecture</a>

%H <a href="/index/Go#Goldbach">Index entries for sequences related to Goldbach conjecture</a>

%H <a href="/index/Par#part">Index entries for sequences related to partitions</a>

%F a(n) = A002375(n) - A278700(n).

%F a(n) = Sum_{i=3..n} (A010051(i) * A010051(2n-i) * (1 - Product_{k=i..n} (1 - abs(A010051(k) - A010051(2n-k))))).

%Y Cf. A002375, A010051, A278700.

%K nonn,easy

%O 1,8

%A _Wesley Ivan Hurt_, Dec 06 2016

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Last modified August 27 17:01 EDT 2024. Contains 375471 sequences. (Running on oeis4.)