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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A226626 Irregular array read by rows. a(n) is the number of odd elements in the primitive Collatz-like 3x-k cycle associated with A226623(n).

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%I A226626 #13 Sep 05 2013 07:56:38
%S A226626 1,2,7,3,4,4,11,12,12,12,12,12,12,12,12,22,8,6,4,14,14,14,8,11,11,11,
%T A226626 44,5,5,5,12,28,14,24,24,24,24,24,14,14,21,21,14,7,7,14,7,7,7,7,7,7,7,
%U A226626 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,32,8
%N A226626 Irregular array read by rows. a(n) is the number of odd elements in the primitive Collatz-like 3x-k cycle associated with A226623(n).
%H A226626 Geoffrey H. Morley, <a href="/A226626/b226626.txt">Rows 1..280 of array, flattened</a>
%e A226626 The irregular array starts:
%e A226626 (k=1)  1, 2, 7;
%e A226626 (k=11) 3;
%e A226626 (k=17) 4, 4;
%e A226626 (k=19) 11;
%e A226626 a(4)=3 is the number of odd elements in the 3x-11 cycle {19,23,29,38} associated with A226623(4)=19
%Y A226626 Row n begins with a(A226628(n)) and has length A226629(n). k=A226630(n).
%Y A226626 The cycle associated with a(n) has length A226625(n) and its largest element is A226624(n).
%Y A226626 Cf. A226610, A226627, A226632, A226689.
%K A226626 nonn,tabf
%O A226626 1,2
%A A226626 _Geoffrey H. Morley_, Jun 13 2013