n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 10 |
6 | 25 |
7 | 68 |
8 | 187 |
9 | 534 |
10 | 1544 |
11 | 4554 |
12 | 13576 |
13 | 40968 |
14 | 124681 |
15 | 382636 |
16 | 1182116 |
17 | 3674674 |
18 | 11483243 |
19 | 36057516 |
20 | 113701968 |
21 | 359927638 |
22 | 1143327888 |
23 | 3643379152 |
24 | 11643793399 |
25 | 37311200060 |
26 | 119852247220 |
27 | 385864664018 |
28 | 1244896820476 |
[1,1,2,4,10,25,68,187,534,1544,4554,13576,40968, 124681,382636,1182116,3674674,11483243,36057516, 113701968,359927638,1143327888,3643379152, 11643793399,37311200060,119852247220,385864664018, 1244896820476] |