n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 22 |
4 | 170 |
5 | 1588 |
6 | 18236 |
7 | 240840 |
8 | 3662424 |
9 | 62456136 |
10 | 1185150768 |
11 | 24714979584 |
12 | 562659843984 |
13 | 13870798275072 |
14 | 368324715871680 |
15 | 10478253239415552 |
16 | 317975367247809408 |
17 | 10252138622419702656 |
18 | 349999438215928660992 |
19 | 12612365665457524786944 |
20 | 478414908509124826439424 |
[1,1,4,22,170,1588,18236,240840,3662424,62456136, 1185150768,24714979584,562659843984, 13870798275072,368324715871680,10478253239415552, 317975367247809408,10252138622419702656, 349999438215928660992,12612365665457524786944, 478414908509124826439424] |