A350957 Number of ways to write 2*n as 3^i (i >= 0) plus a prime.

0, 1, 2, 2, 1, 2, 3, 2, 1, 3, 2, 1, 2, 1, 2, 4, 2, 0, 3, 3, 1, 3, 3, 1, 3, 1, 1, 3, 1, 1, 3, 2, 0, 3, 3, 1, 3, 2, 0, 3, 2, 2, 3, 3, 1, 3, 2, 0, 4, 3, 1, 3, 3, 1, 5, 3, 1, 3, 2, 0, 2, 2, 0, 3, 2, 1, 3, 2, 1, 5, 2, 0, 1, 2, 1, 3, 3, 0, 3, 3, 0, 3, 3, 1, 2, 1, 1, 3, 2, 1, 4, 3, 0, 2, 3

Offset

1,3

Links

Table of n, a(n) for n=1..95.

Formula

a(n) = A282432(2*n). - R. J. Mathar, Mar 07 2022

Crossrefs

Cf. A006285, A058517, A350628-A350630, A350958, A282432.

Sequence in context: A072781 A340094 A236566 * A046923 A184703 A309287

Adjacent sequences: A350954 A350955 A350956 * A350958 A350959 A350960

Keyword

nonn

Author

N. J. A. Sloane, Feb 05 2022

Status

approved