A077407 In base 3, records for the number of Reverse and Add! steps needed to reach a palindrome.

0, 1, 2, 3, 4, 18, 20, 21, 27, 28, 55, 56, 57, 70

Offset: 1

Author

Klaus Brockhaus, Nov 05 2002

Keywords

• base
• more
• nonn

Comments

RECORDS transform of A077402. Base-3 analog of A066145 (base 2), A075687 (base 4) and A065199 (base 10). A077406 gives the corresponding starting points.

Probable Lychrel numbers are ignored, the first of which is 103. - Sean A. Irvine, Apr 19 2010

Examples

			Starting with 15, 3 Reverse and Add! steps are needed to reach a palindrome; starting with n < 15, less (at most 2) steps are needed.
		

Links

• N. J. A. Sloane, Transforms
• Index entries for sequences related to Reverse and Add!

Crossrefs

Cf. A065199, A066145, A075687, A077402, A077406.

Extensions

a(14) from Sean A. Irvine, Apr 19 2010