n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 9 |
4 | 26 |
5 | 70 |
6 | 197 |
7 | 553 |
8 | 1570 |
9 | 4476 |
10 | 12827 |
11 | 36894 |
12 | 106471 |
13 | 308113 |
14 | 893804 |
15 | 2598313 |
16 | 7567466 |
17 | 22076404 |
18 | 64498427 |
19 | 188689684 |
20 | 552675365 |
21 | 1620567763 |
22 | 4756614062 |
23 | 13974168190 |
24 | 41088418151 |
25 | 120906613075 |
26 | 356035078102 |
[1,1,4,9,26,70,197,553,1570,4476,12827,36894, 106471,308113,893804,2598313,7567466,22076404, 64498427,188689684,552675365,1620567763, 4756614062,13974168190,41088418151,120906613075, 356035078102] |