n | a(n) |
---|---|
2 | 1 |
3 | 1 |
4 | 3 |
5 | 4 |
6 | 31 |
7 | 15 |
8 | 55 |
9 | 110 |
10 | 280 |
11 | 797 |
12 | 1419 |
13 | 3557 |
14 | 5647 |
15 | 19559 |
16 | 59708 |
17 | 360726 |
18 | 346487 |
19 | 2018032 |
20 | 2106172 |
21 | 13228494 |
22 | 13994982 |
23 | 65426469 |
24 | 110980446 |
25 | 257148638 |
26 | 660593345 |
27 | 1966842579 |
28 | 3909078573 |
29 | 20820932559 |
30 | 26864715089 |
31 | 144689720443 |
32 | 307476230099 |
33 | 571509614773 |
[1,1,3,4,31,15,55,110,280,797,1419,3557,5647, 19559,59708,360726,346487,2018032,2106172, 13228494,13994982,65426469,110980446,257148638, 660593345,1966842579,3909078573,20820932559, 26864715089,144689720443,307476230099, 571509614773] |