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A350628
Number of ways to write 2*n as 3^i (i >= 1) plus a prime.
5
0, 0, 1, 1, 1, 1, 2, 2, 0, 2, 2, 0, 2, 1, 1, 3, 2, 0, 2, 3, 0, 2, 3, 0, 3, 1, 0, 3, 1, 0, 2, 2, 0, 2, 3, 0, 2, 2, 0, 2, 2, 1, 3, 3, 0, 3, 2, 0, 3, 3, 0, 2, 3, 0, 4, 3, 0, 3, 2, 0, 2, 2, 0, 2, 2, 0, 3, 2, 0, 4, 2, 0, 1, 2, 0, 2, 3, 0, 2, 3, 0, 2, 3, 0, 2, 1, 0, 3, 2, 0, 3, 3, 0, 2, 3
OFFSET
1,7
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 05 2022
STATUS
approved