Search: id:A046920
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%I A046920
%S A046920 1,1,2,1,2,0,2,0,2,1,2,0,3,0,2,0,1,0,4,1,3,0,2,0,3,0,1,0,2,0,4,0,2,
%T A046920 1,2,0,4,0,3,0,2,0,3,0,3,0,2,0,4,0,3,1,2,0,5,0,1,0,2,0,6,0,3,0,1,0,
%U A046920 3,0,4,0,2,0,5,1,4,0,2,0,6,0,3,0,2,0,4,0,2,0,3,0,6,0,2,0,1,0,4,0,3
%N A046920 Number of ways to express n as p+2a^2; p = 1 or prime, a >= 0.
%H A046920 T. D. Noe, <a href="b046920.txt">Table of n, a(n) for n=1..10000</a>
%H A046920 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 A046920 <a href="Sindx_Go.html#Goldbach">Index entries for sequences related 
               to Goldbach conjecture</a>
%Y A046920 Cf. A042978, A046921, A046922, A046923, A060003, A143539
%Y A046920 Sequence in context: A053838 A117167 A117169 this_sequence A107599 A156836 
               A079483
%Y A046920 Adjacent sequences: A046917 A046918 A046919 this_sequence A046921 A046922 
               A046923
%K A046920 nonn
%O A046920 1,3
%A A046920 David W. Wilson (davidwwilson(AT)comcast.net)

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