A046924 Number of ways to express n as p+2q; p, q = 1 or prime.

0, 0, 1, 1, 2, 1, 3, 1, 3, 0, 3, 1, 3, 0, 4, 1, 4, 0, 3, 0, 4, 0, 4, 1, 4, 0, 5, 1, 4, 0, 3, 0, 6, 0, 4, 1, 4, 0, 6, 1, 5, 0, 5, 0, 7, 0, 5, 1, 5, 0, 7, 0, 5, 0, 4, 0, 7, 0, 4, 1, 4, 0, 9, 1, 7, 0, 5, 0, 8, 0, 4, 0, 5, 0, 10, 1, 7, 0, 5, 0, 9, 0, 5, 1, 8, 0, 9, 1, 7, 0, 5, 0, 11, 0, 6, 1, 6, 0

Offset

1,5

Links

Table of n, a(n) for n=1..98.

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: A240694 A258643 A287561 * A015710 A108415 A278572

Adjacent sequences: A046921 A046922 A046923 * A046925 A046926 A046927

Keyword

nonn

Author

David W. Wilson

Status

approved