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A226624 Irregular array read by rows. a(n) is the largest element in the primitive Collatz-like 3x-k cycle associated with A226623(n).

%I A226624 #15 Sep 05 2013 07:57:08
%S A226624 1,7,91,29,179,143,505,17033,16793,15497,31613,19589,25781,15845,
%T A226624 12137,2011,311,517,103,19031,24623,8339,811,2609,7387,2995,18275,601,
%U A226624 493,421,1577,74611,13699,1793597,275693,177521,226769,144881
%N A226624 Irregular array read by rows. a(n) is the largest element in the primitive Collatz-like 3x-k cycle associated with A226623(n).
%H A226624 Geoffrey H. Morley, <a href="/A226624/b226624.txt">Rows 1..280 of array, flattened</a>
%e A226624 The irregular array starts:
%e A226624 (k=1)  1, 7, 91;
%e A226624 (k=11) 29;
%e A226624 (k=17) 179, 143;
%e A226624 (k=19) 505;
%e A226624 a(4)=29 is the largest element in the 3x-11 cycle {19,23,29,38} associated with A226623(4)=19.
%Y A226624 Row n begins with a(A226628(n)) and has length A226629(n). k=A226630(n).
%Y A226624 The cycle associated with a(n) has length A226625(n) and A226626(n) odd elements.
%Y A226624 Cf. A226608, A226627, A226683, A226684, A226685.
%K A226624 nonn,tabf
%O A226624 1,2
%A A226624 _Geoffrey H. Morley_, Jun 13 2013