A226609 Irregular array read by rows. a(n) is the length of the primitive Collatz-like 3x+k cycle associated with A226607(n).

2, 3, 5, 5, 27, 27, 4, 6, 14, 4, 24, 8, 8, 8, 8, 8, 8, 8, 7, 31, 11, 5, 5, 43, 16, 8, 5, 17, 65, 65, 23, 8, 8, 6, 6, 6, 20, 11, 18, 28, 7, 7, 7, 7, 7, 38, 29, 12, 6, 28, 28, 10, 10, 10, 10, 10, 10, 6, 66, 24, 30, 10, 10, 27, 27, 27, 27, 27, 12, 60, 15, 38

Offset

1,1

Links

Geoffrey H. Morley, Rows 1..2032 of array, flattened

Example

The irregular array starts:
(k=1)  2;
(k=5)  3, 5, 5, 27, 27;
(k=7)  4;
(k=11) 6, 14;
a(2)=3 is the length of the 3x+5 cycle {1,4,2} associated with A226607(2)=1.

Crossrefs

Row n begins with a(A226612(n)) and has length A226613(n).

The cycle associated with a(n) has A226610(n) odd elements of which A226608(n) is the largest.

Cf. A226611, A226625, A226670-A226672.

Sequence in context: A368674 A095296 A256301 * A370730 A157260 A336017

Adjacent sequences: A226606 A226607 A226608 * A226610 A226611 A226612

Keyword

nonn,tabf

Author

Geoffrey H. Morley, Jun 13 2013

Status

approved