1,3
A002067 mod 5 is 1, 1, 2, 2, 4, 4, 3, 3, 1, 1, 2, 2, 4, 4, 3, 3, 1, 1, ... with period 8.
Cf. A002067, A122149.
nonn,more,new
njas, Aug 06 2008
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