n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 18 |
3 | 101 |
4 | 392 |
5 | 1119 |
6 | 2904 |
7 | 6407 |
8 | 13578 |
9 | 26218 |
10 | 49218 |
11 | 86782 |
12 | 150860 |
13 | 249723 |
14 | 408810 |
15 | 647170 |
16 | 1013278 |
17 | 1545029 |
18 | 2337738 |
19 | 3460218 |
20 | 5086658 |
21 | 7350874 |
22 | 10549872 |
23 | 14929931 |
24 | 21009874 |
25 | 29205500 |
26 | 40385036 |
27 | 55289000 |
28 | 75309056 |
29 | 101692923 |
30 | 136710130 |
31 | 182377824 |
[0,1,18,101,392,1119,2904,6407,13578,26218,49218, 86782,150860,249723,408810,647170,1013278,1545029, 2337738,3460218,5086658,7350874,10549872,14929931, 21009874,29205500,40385036,55289000,75309056, 101692923,136710130,182377824] |