A260584 - cp's OEIS frontend

A260584 Number of ways to place 4n rooks on n X n board, 4 rooks in each row and each column, multiple rooks in a cell allowed, and exactly 4 rooks below the main diagonal.

n	a(n)
2	1
3	42
4	1152
5	22785
6	358784
7	4848569
8	59160195
9	674020718
10	7332379979
11	77311947872
12	798116114567
13	8122264310217
14	81865063934240
15	819786478839348
16	8173571362926773
17	81256681626746819
18	806240597786756436
19	7989356540290573170

[1, 42, 1152, 22785, 358784, 4848569, 59160195, 674020718, 7332379979, 77311947872, 798116114567, 8122264310217, 81865063934240, 819786478839348, 8173571362926773, 81256681626746819, 806240597786756436, 7989356540290573170]

cp's OEIS Frontend

A260584 Number of ways to place 4n rooks on n X n board, 4 rooks in each row and each column, multiple rooks in a cell allowed, and exactly 4 rooks below the main diagonal.

Table of values

List of values