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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified July 24 03:01 EDT 2019. Contains 325290 sequences. (Running on oeis4.)