A145079 Length of cycle of trajectory of n described in A098282, or -1 if no cycle is ever reached.

1, 1, 1, 1, 1, 4, 1, 4, 4, 4, 1, 4, 4, 1, 4, 1, 1, 1, 4, 4, 1, 4, 4, 1, 2, 1, 1, 1, 4, 4, 1, 1, 2, 1, 1, 1, 4, 1, 1, 4, 4, 1, 1, 1, 4, 4, 4, 4, 1, 4, 1

Offset: 1

Author

David Applegate and N. J. A. Sloane, Feb 09 2009

Keywords

• nonn
• more
• base

Comments

a(52) is currently unknown. - Donovan Johnson

a(40) is probably incorrect and should be 1. (See corrections to A098282 and A144914.)

Crossrefs

Cf. A098282, A087712, A145077, A145078, A077960.

Extensions

a(19)-a(39) from John W. Layman, Mar 12 2010

a(40)-a(51) from Donovan Johnson, Jan 08 2011