|
| |
|
|
A039987
|
|
k th digit of a(n) = number of different digits within 2 places of k (not including k).
|
|
0
|
|
|
|
11, 111, 122, 212, 221, 1111, 1221, 2122, 2212, 11111, 12212, 12221, 13322, 21221, 22122, 22331, 111111, 122122, 122212, 122221, 212212, 212221, 221221, 1111111, 1221221, 1222122, 1222212, 2122122, 2122212, 2122221, 2212212, 2212221
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,1
|
|
|
LINKS
|
Table of n, a(n) for n=0..31.
|
|
|
EXAMPLE
|
2122 works, since 2=|{1,2}|, 1=|{2,2,2}|, 2=|{2,1,2}| and 2=|{1,2}|
|
|
|
CROSSREFS
|
Sequence in context: A098759 A135464 A083278 * A039989 A092819 A209233
Adjacent sequences: A039984 A039985 A039986 * A039988 A039989 A039990
|
|
|
KEYWORD
|
base,easy,nonn
|
|
|
AUTHOR
|
Erich Friedman
|
|
|
STATUS
|
approved
|
| |
|
|
