n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 36 |
4 | 168 |
5 | 720 |
6 | 3304 |
7 | 15088 |
8 | 69904 |
9 | 326624 |
10 | 1535040 |
11 | 7251968 |
12 | 34448064 |
13 | 164071424 |
14 | 784830976 |
15 | 3762710272 |
16 | 18090215424 |
17 | 87167033856 |
18 | 420815500544 |
19 | 2035432822272 |
20 | 9860443239424 |
21 | 47839254740992 |
22 | 232412062604288 |
23 | 1130458029407232 |
24 | 5504894214334464 |
25 | 26834127921946624 |
26 | 130931569849067520 |
[1,2,10,36,168,720,3304,15088,69904,326624, 1535040,7251968,34448064,164071424,784830976, 3762710272,18090215424,87167033856,420815500544, 2035432822272,9860443239424,47839254740992, 232412062604288,1130458029407232,5504894214334464, 26834127921946624,130931569849067520] |