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Essentially same as A005811.
0

%I #1 Dec 11 1999 03:00:00

%S 1,1,2,1,2,3,2,1,2,3,4,3,2,3,2,1,2,3,4,3,4,5,4,3,2,3,4,3

%N Essentially same as A005811.

%K dead

%O 0,3