n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 60 |
6 | 260 |
7 | 1267 |
8 | 6850 |
9 | 40572 |
10 | 260812 |
11 | 1805646 |
12 | 13377274 |
13 | 105487540 |
14 | 881338060 |
15 | 7770957903 |
16 | 72060991394 |
17 | 700653026744 |
18 | 7123871583656 |
19 | 75561097962918 |
20 | 834285471737784 |
21 | 9570207406738352 |
22 | 113855103776348136 |
23 | 1402523725268921870 |
24 | 17863056512845724036 |
25 | 234910502414771617316 |
26 | 3185732802058088068444 |
27 | 44501675392317774477088 |
[1,1,2,5,16,60,260,1267,6850,40572,260812,1805646, 13377274,105487540,881338060,7770957903, 72060991394,700653026744,7123871583656, 75561097962918,834285471737784,9570207406738352, 113855103776348136,1402523725268921870, 17863056512845724036,234910502414771617316, 3185732802058088068444,44501675392317774477088] |