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A007457
# of (j,k): j+k=n, (j,n)=(k,n)=1, j,k square-free.
(Formerly M0224)
+0
1
0, 1, 2, 2, 2, 2, 4, 4, 2, 2, 4, 4, 6, 4, 4, 6, 8, 6, 6, 6, 4, 8, 8, 8, 8, 8, 8, 6, 10, 8, 10, 10, 8, 12, 8, 10, 14, 12, 10, 12, 16, 10, 18, 14, 12, 14, 16, 14, 16, 14, 10, 16, 20, 14, 12, 16, 14, 20, 18, 14, 22, 20, 16, 20
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Maintained by
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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.
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