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 A226610 #8 Jun 15 2013 00:43:26
%S A226610 1,1,3,3,17,17,2,2,8,1,15,5,5,5,5,5,5,5,2,18,5,2,2,26,8,4,1,9,41,41,
%T A226610 12,4,4,3,3,3,8,3,7,16,4,4,4,4,4,22,17,4,2,16,11,6,6,6,6,6,6,1,41,12,
%U A226610 16,5,5,17,17,17,17,17,4,32,8,16,20,20,14,14
%N A226610 Irregular array read by rows. a(n) is the number of odd elements in the primitive 3x+k cycle associated with A226607(n).
%H A226610 Geoffrey H. Morley, <a href="/A226610/b226610.txt">Rows 1..2032 of array, flattened</a>
%e A226610 The irregular array starts:
%e A226610 (k=1) 1;
%e A226610 (k=5) 1, 3, 3, 17, 17;
%e A226610 (k=7) 2;
%e A226610 (k=11) 2, 8;
%e A226610 a(2)=1 is the number of odd elements in the 3x+5 cycle {1,4,2} associated with A226607(2)=1.
%Y A226610 Row n begins with a(A226612(n)) and has length A226613(n).
%Y A226610 The cycle associated with a(n) has length A226609(n) and its largest element is A226608(n).
%Y A226610 Cf. A226611, A226626.
%K A226610 nonn,tabf
%O A226610 1,3
%A A226610 _Geoffrey H. Morley_, Jun 13 2013