A061390 Use same rules as A047988. Sequence gives smallest numbers which require n steps to reach 2.

3, 5, 7, 14, 38, 172, 823, 6185, 87223, 1940494

Offset: 1

Author

Jason Earls, Jun 09 2001

Keywords

• nonn
• more

Comments

Some values calculated by Joseph Devincentis.

a(11) > 5000000. - David Wasserman, Jun 21 2002

Links

• Erich Friedman, Math. Magic

Crossrefs

Cf. A047984.

Extensions

More terms from David Wasserman, Jun 21 2002