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A046925 Number of ways to express 2n+1 as p+2q; p, q = 1 or prime. 0


%S 0,1,2,3,3,3,3,4,4,3,4,4,4,5,4,3,6,4,4,6,5,5,7,5,5,7,5,4,7,4,4,9,7,5,

%T 8,4,5,10,7,5,9,5,8,9,7,5,11,6,6,10,6,6,13,7,7,11,8,7,11,8,5,12,8,6,

%U 11,6,7,14,8,6,14,7,9,13,8,7,15,8,6,13,10,9,17,6,9,13,9,10,14,8,7

%N Number of ways to express 2n+1 as p+2q; p, q = 1 or prime.

%H L. Hodges, <a href="http://learning.physics.iastate.edu/hodges/mm-1.pdf">A lesser-known Goldbach conjecture</a>, Math. Mag., 66 (1993), 45-47.

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

%K nonn

%O 0,3

%A _David W. Wilson_

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Last modified May 27 15:15 EDT 2017. Contains 287207 sequences.