n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 10 |
4 | 38 |
5 | 127 |
6 | 498 |
7 | 1846 |
8 | 7458 |
9 | 29123 |
10 | 120377 |
11 | 486047 |
12 | 2044320 |
13 | 8456536 |
14 | 36043135 |
15 | 151821939 |
16 | 653902619 |
17 | 2792757249 |
18 | 12132725385 |
19 | 52385920494 |
20 | 229244652005 |
21 | 998645414067 |
22 | 4397348211972 |
23 | 19297997436455 |
24 | 85431003830801 |
25 | 377265869504289 |
26 | 1677950193296670 |
27 | 7449555762421172 |
[1,1,4,10,38,127,498,1846,7458,29123,120377, 486047,2044320,8456536,36043135,151821939, 653902619,2792757249,12132725385,52385920494, 229244652005,998645414067,4397348211972, 19297997436455,85431003830801,377265869504289, 1677950193296670,7449555762421172] |