n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 4 |
7 | 12 |
8 | 30 |
9 | 60 |
10 | 121 |
11 | 217 |
12 | 364 |
13 | 700 |
14 | 1260 |
15 | 2250 |
16 | 4960 |
17 | 9460 |
18 | 17380 |
19 | 38500 |
20 | 71071 |
21 | 126763 |
22 | 276549 |
23 | 503685 |
24 | 898380 |
25 | 2006508 |
26 | 3681588 |
27 | 6619596 |
28 | 14981556 |
29 | 27412041 |
30 | 49146654 |
31 | 111406614 |
32 | 202871284 |
33 | 363087604 |
34 | 828004144 |
[0,0,0,0,1,4,12,30,60,121,217,364,700,1260,2250, 4960,9460,17380,38500,71071,126763,276549,503685, 898380,2006508,3681588,6619596,14981556,27412041, 49146654,111406614,202871284,363087604,828004144] |