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Irregular array read by rows in which a(n) is the number of odd elements in each primitive '3x+k' cycle associated with A226619(n).
3

%I #5 Jul 04 2013 21:16:50

%S 1,0,1,2,1,3,2,1,4,3,2,1,5,4,2,3,2,1,6,5,2,4,3,2,1,7,6,5,4,4,4,3,2,1,

%T 8,7,6,6,3,5,4,3,2,1,9,8,7,8,6,5,2,2,6,5,4,3,2,1,10,9,8,7,7,5,3,5,4,5,

%U 6,5,4,3,2,1,11,10,9,8,9,8,8,8,8,4,4,7

%N Irregular array read by rows in which a(n) is the number of odd elements in each primitive '3x+k' cycle associated with A226619(n).

%C The terms in row n are associated with cycles of length n (see A226619).

%H Geoffrey H. Morley, <a href="/A226620/b226620.txt">Rows 1..26 of array, flattened</a>

%e The irregular array starts:

%e 1, 0;

%e 1;

%e 2, 1;

%e 3, 2, 1;

%e 4, 3, 2, 1;

%e 5, 4, 2, 3, 2, 1; ...

%Y Cf. A226621.

%K nonn,tabf

%O 1,4

%A _Geoffrey H. Morley_, Jul 02 2013