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.
%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