n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 15 |
3 | 93 |
4 | 644 |
5 | 4769 |
6 | 36953 |
7 | 295867 |
8 | 2428373 |
9 | 20322566 |
10 | 172759032 |
11 | 1487632887 |
12 | 12948891408 |
13 | 113748663495 |
14 | 1007117650350 |
15 | 8978151790011 |
16 | 80519598139947 |
17 | 725976573163011 |
18 | 6576546244337046 |
19 | 59829384514916820 |
20 | 546375444906314661 |
21 | 5006934930385254672 |
[1,3,15,93,644,4769,36953,295867,2428373,20322566, 172759032,1487632887,12948891408,113748663495, 1007117650350,8978151790011,80519598139947, 725976573163011,6576546244337046, 59829384514916820,546375444906314661, 5006934930385254672] |