A075686 In base 4, n sets a new record for the number of Reverse and Add! steps needed to reach a palindrome starting with n.

0, 4, 7, 26, 28, 127, 199, 296, 511, 3119, 16861, 18164, 19453, 20468, 270824

Offset

0,2

Comments

RECORDS transform of A075685. - Base-4 analog of A065198 (base 10) and A066144 (base 2). Integers like 290, for which a palindrome is (presumably) never reached (cf. A075420), are of course disregarded. A075687 gives the corresponding records.

Links

Table of n, a(n) for n=0..14.

N. J. A. Sloane, Transforms

Index entries for sequences related to Reverse and Add!

Example

Starting with 26, 3 Reverse and Add! steps are needed to reach a palindrome; starting with n < 26, less (at most 2) steps are needed.

Crossrefs

Cf. A065198, A066144, A075420, A075685, A075687.

Sequence in context: A151348 A211942 A110413 * A077441 A378100 A269744

Adjacent sequences: A075683 A075684 A075685 * A075687 A075688 A075689

Keyword

base,more,nonn

Author

Klaus Brockhaus, Sep 24 2002

Status

approved