n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 7 |
4 | 25 |
5 | 88 |
6 | 311 |
7 | 1095 |
8 | 3858 |
9 | 13591 |
10 | 47881 |
11 | 168688 |
12 | 594289 |
13 | 2093693 |
14 | 7376120 |
15 | 25986209 |
16 | 91549913 |
17 | 322532092 |
18 | 1136286727 |
19 | 4003159847 |
20 | 14103208628 |
21 | 49685873471 |
22 | 175044281583 |
23 | 616684348614 |
24 | 2172590743211 |
25 | 7654078700221 |
26 | 26965465508072 |
27 | 94999850216565 |
[1,2,7,25,88,311,1095,3858,13591,47881,168688, 594289,2093693,7376120,25986209,91549913, 322532092,1136286727,4003159847,14103208628, 49685873471,175044281583,616684348614, 2172590743211,7654078700221,26965465508072, 94999850216565] |