n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 21 |
6 | 54 |
7 | 148 |
8 | 442 |
9 | 1433 |
10 | 5061 |
11 | 19394 |
12 | 80308 |
13 | 357241 |
14 | 1697870 |
15 | 8577240 |
16 | 45845235 |
17 | 258198133 |
18 | 1526631800 |
19 | 9445795717 |
20 | 60988643813 |
21 | 409933740177 |
22 | 2862338202947 |
23 | 20723903238290 |
24 | 155329193200741 |
25 | 1203428108558453 |
26 | 9624564394649845 |
27 | 79357873429159078 |
[1,1,2,4,9,21,54,148,442,1433,5061,19394,80308, 357241,1697870,8577240,45845235,258198133, 1526631800,9445795717,60988643813,409933740177, 2862338202947,20723903238290,155329193200741, 1203428108558453,9624564394649845, 79357873429159078] |