|
|
A185056
|
|
Number of ways to place n nonattacking composite pieces bishop + semi-rook on an n X n board.
|
|
0
|
|
|
1, 2, 5, 24, 125, 796, 5635, 48042, 453947, 4834872, 56433455, 727449366, 10099103269, 152097526360, 2449915208271, 42295879864692
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
Two semi-rooks do not attack each other if they are in the same column.
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,hard
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|