n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 40 |
4 | 105 |
5 | 252 |
6 | 574 |
7 | 1240 |
8 | 2580 |
9 | 5180 |
10 | 10108 |
11 | 19208 |
12 | 35693 |
13 | 64960 |
14 | 116090 |
15 | 203984 |
16 | 353017 |
17 | 602348 |
18 | 1014580 |
19 | 1688400 |
20 | 2778517 |
21 | 4524760 |
22 | 7296752 |
23 | 11658920 |
24 | 18468245 |
25 | 29015700 |
26 | 45235414 |
27 | 70005376 |
28 | 107585845 |
29 | 164245380 |
30 | 249162620 |
31 | 375704920 |
32 | 563251038 |
[1,4,14,40,105,252,574,1240,2580,5180,10108,19208, 35693,64960,116090,203984,353017,602348,1014580, 1688400,2778517,4524760,7296752,11658920,18468245, 29015700,45235414,70005376,107585845,164245380, 249162620,375704920,563251038] |