n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 8 |
5 | 22 |
6 | 61 |
7 | 171 |
8 | 483 |
9 | 1373 |
10 | 3923 |
11 | 11257 |
12 | 32418 |
13 | 93644 |
14 | 271219 |
15 | 787333 |
16 | 2290200 |
17 | 6673662 |
18 | 19478091 |
19 | 56930961 |
20 | 166613280 |
21 | 488176938 |
22 | 1431878079 |
23 | 4203938697 |
24 | 12353600427 |
25 | 36331804089 |
26 | 106932444885 |
27 | 314946659951 |
28 | 928213563878 |
[1,1,1,3,8,22,61,171,483,1373,3923,11257,32418, 93644,271219,787333,2290200,6673662,19478091, 56930961,166613280,488176938,1431878079, 4203938697,12353600427,36331804089,106932444885, 314946659951,928213563878] |