A145078 Minimal value of cycle of trajectory of n described in A098282, or -1 if no cycle is ever reached.

1, 1, 1, 1, 1, 9, 1, 9, 9, 9, 1, 9, 9, 14, 9, 1, 1, 1, 9, 9, 1, 9, 9, 1, 25, 1, 1, 1, 9, 9, 1, 1, 25, 1, 1, 1, 9, 1, 1, 9, 9, 1, 14, 1, 9, 9, 9, 9, 1, 9, 1

Offset: 1

Author

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

Keywords

• nonn
• more

Comments

a(52) is currently unknown. - Donovan Johnson

a(40) is probably incorrect and should be 1. (See corrections to A098282 and A144914.) - Andrew Howroyd, Feb 06 2018

Crossrefs

Cf. A098282, A087712, A145077, A145079, A077960.

Extensions

Comment edited by John W. Layman, Nov 03 2010

a(1)-a(18) confirmed and a(19)-a(39) added by John W. Layman, Nov 03 2010

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