n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 14 |
4 | 40 |
5 | 116 |
6 | 336 |
7 | 976 |
8 | 2835 |
9 | 8238 |
10 | 23940 |
11 | 69580 |
12 | 202235 |
13 | 587822 |
14 | 1708606 |
15 | 4966420 |
16 | 14436034 |
17 | 41961830 |
18 | 121972548 |
19 | 354544354 |
20 | 1030574824 |
21 | 2995634338 |
22 | 8707595956 |
23 | 25310916258 |
24 | 73572844430 |
25 | 213858876100 |
26 | 621637274730 |
27 | 1806952922994 |
28 | 5252386090589 |
29 | 15267448253302 |
[1,2,5,14,40,116,336,976,2835,8238,23940,69580, 202235,587822,1708606,4966420,14436034,41961830, 121972548,354544354,1030574824,2995634338, 8707595956,25310916258,73572844430,213858876100, 621637274730,1806952922994,5252386090589, 15267448253302] |