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A046925
Number of ways to express 2n+1 as p+2q; p, q = 1 or prime.
0
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, 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, 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
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..90.
L. Hodges,
A lesser-known Goldbach conjecture
, Math. Mag., 66 (1993), 45-47.
Index entries for sequences related to Goldbach conjecture
CROSSREFS
Sequence in context:
A093493
A087162
A288914
*
A090529
A297212
A155934
Adjacent sequences:
A046922
A046923
A046924
*
A046926
A046927
A046928
KEYWORD
nonn
AUTHOR
David W. Wilson
STATUS
approved
