|
| |
|
|
A195656
|
|
Number of ways to place 12n nonattacking kings on a 24 X 2n cylindrical chessboard.
|
|
3
|
|
|
|
53248, 233476, 1257754, 7682812, 51698178, 378088270, 2980927200, 25173962492, 226268016376, 2149806985106, 21437333168798, 222770819826574, 2396574908171782, 26535227773186536, 300870737118178194, 3479000496509382748, 40885324678195409820
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
This cylinder is horizontal: a chessboard where it is supposed that the rows 1 and 2n are in contact (number of columns = 24, number of rows = 2n)
|
|
|
LINKS
|
Alex V. Breger, Table of n, a(n) for n = 1..500
Max A. Alekseyev, Denominator of the generating function
Artem M. Karavaev, Zealint blog (in Russian)
V. Kotesovec, Non-attacking chess pieces
Vaclav Kotesovec, Generating function
|
|
|
FORMULA
|
Recurrence order is 4248
|
|
|
CROSSREFS
|
Cf. A137432, A195653, A195654, A195655, A195651, A195661.
Sequence in context: A155557 A015315 A061330 * A195651 A164519 A186199
Adjacent sequences: A195653 A195654 A195655 * A195657 A195658 A195659
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Vaclav Kotesovec, Sep 22 2011
|
|
|
STATUS
|
approved
|
| |
|
|
