n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 27 |
5 | 118 |
6 | 537 |
7 | 2570 |
8 | 12587 |
9 | 63173 |
10 | 322385 |
11 | 1669144 |
12 | 8742999 |
13 | 46253727 |
14 | 246771340 |
15 | 1326236480 |
16 | 7173280391 |
17 | 39017312543 |
18 | 213287030596 |
19 | 1171140510636 |
20 | 6456473371424 |
21 | 35723687996130 |
22 | 198311302682834 |
23 | 1104189489401230 |
[1,1,2,7,27,118,537,2570,12587,63173,322385, 1669144,8742999,46253727,246771340,1326236480, 7173280391,39017312543,213287030596,1171140510636, 6456473371424,35723687996130,198311302682834, 1104189489401230] |