Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 3 |
4 | 0 |
5 | 20 |
6 | 90 |
7 | 203 |
8 | 3360 |
9 | 11640 |
10 | 123480 |
11 | 971883 |
12 | 7155720 |
13 | 81842540 |
14 | 689969280 |
15 | 8098733243 |
16 | 87787889280 |
17 | 1037050927920 |
18 | 13312247451840 |
19 | 170378180195283 |
20 | 2401844355066240 |
21 | 34222349644158980 |
22 | 518547579965036160 |
23 | 8138997539240165003 |
24 | 132773771778775670400 |
[1,0,0,3,0,20,90,203,3360,11640,123480,971883, 7155720,81842540,689969280,8098733243,87787889280, 1037050927920,13312247451840,170378180195283, 2401844355066240,34222349644158980, 518547579965036160,8138997539240165003, 132773771778775670400] |