n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1212 |
3 | 11584 |
4 | 70380 |
5 | 261120 |
6 | 776800 |
7 | 1989504 |
8 | 4398252 |
9 | 8878080 |
10 | 16788312 |
11 | 29833920 |
12 | 50078944 |
13 | 80686080 |
14 | 126457920 |
15 | 191702144 |
16 | 281524140 |
17 | 403691520 |
18 | 570110556 |
19 | 793005120 |
20 | 1074444600 |
21 | 1431982080 |
22 | 1903243680 |
23 | 2494537344 |
24 | 3204056800 |
25 | 4082872320 |
26 | 5185620120 |
[1,0,1212,11584,70380,261120,776800,1989504, 4398252,8878080,16788312,29833920,50078944, 80686080,126457920,191702144,281524140,403691520, 570110556,793005120,1074444600,1431982080, 1903243680,2494537344,3204056800,4082872320, 5185620120] |