|
|
A359521
|
|
Number of free mature snake polyominoes of n cells, where mature means that the snake cannot grow in either direction.
|
|
0
|
|
|
4, 0, 26, 0, 194, 17, 1086, 152, 6140, 1006, 32713, 6335, 172379, 38800
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
15,1
|
|
LINKS
|
|
|
EXAMPLE
|
a(15) = 4 because of:
OOO OOO OOO OOO
O O O O O O O O
O OO O OO O OO OO OO
O O OO O OOO O OO O
OOOOO OOOO OOO OOO
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|