|
|
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.
|
|
3
|
|
|
0, 4, 7, 26, 28, 127, 199, 296, 511, 3119, 16861, 18164, 19453, 20468, 270824
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
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
|
|
|
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
|
|
|
KEYWORD
|
base,more,nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|