A180142 - cp's OEIS frontend

A180142 Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: (1 + x - x^2)/(1 - 3x - 3x^2).

n	a(n)
0	1
1	4
2	14
3	54
4	204
5	774
6	2934
7	11124
8	42174
9	159894
10	606204
11	2298294
12	8713494
13	33035364
14	125246574
15	474845814
16	1800277164
17	6825368934
18	25876938294
19	98106921684
20	371951579934
21	1410175504854
22	5346381254364
23	20269670277654
24	76848154596054
25	291353474621124

[1, 4, 14, 54, 204, 774, 2934, 11124, 42174, 159894, 606204, 2298294, 8713494, 33035364, 125246574, 474845814, 1800277164, 6825368934, 25876938294, 98106921684, 371951579934, 1410175504854, 5346381254364, 20269670277654, 76848154596054, 291353474621124]

cp's OEIS Frontend

A180142 Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: (1 + x - x^2)/(1 - 3x - 3x^2).

Table of values

List of values

cp's OEIS Frontend

A180142 Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: (1 + x - x^2)/(1 - 3*x - 3*x^2).

Table of values

List of values

A180142 Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: (1 + x - x^2)/(1 - 3x - 3x^2).