n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 19 |
5 | 48 |
6 | 125 |
7 | 329 |
8 | 862 |
9 | 2255 |
10 | 5903 |
11 | 15456 |
12 | 40465 |
13 | 105937 |
14 | 277346 |
15 | 726103 |
16 | 1900963 |
17 | 4976784 |
18 | 13029389 |
19 | 34111385 |
20 | 89304766 |
21 | 233802911 |
22 | 612103967 |
23 | 1602508992 |
24 | 4195423009 |
25 | 10983760033 |
26 | 28755857090 |
27 | 75283811239 |
28 | 197095576627 |
[1,1,2,7,19,48,125,329,862,2255,5903,15456,40465, 105937,277346,726103,1900963,4976784,13029389, 34111385,89304766,233802911,612103967,1602508992, 4195423009,10983760033,28755857090,75283811239, 197095576627] |