n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 3 |
4 | 7 |
5 | 20 |
6 | 63 |
7 | 215 |
8 | 783 |
9 | 2998 |
10 | 11977 |
11 | 49656 |
12 | 212738 |
13 | 938836 |
14 | 4257792 |
15 | 19808597 |
16 | 94405713 |
17 | 460412410 |
18 | 2295740045 |
19 | 11695447378 |
20 | 60837384509 |
21 | 322968172763 |
22 | 1748975296265 |
23 | 9657311996480 |
24 | 54350006350292 |
25 | 311630231535041 |
26 | 1819713622889812 |
27 | 10817233370816701 |
28 | 65434087495967354 |
29 | 402615569685977397 |
30 | 2518832660928798529 |
31 | 16016013141937173805 |
[1,1,2,3,7,20,63,215,783,2998,11977,49656,212738, 938836,4257792,19808597,94405713,460412410, 2295740045,11695447378,60837384509,322968172763, 1748975296265,9657311996480,54350006350292, 311630231535041,1819713622889812, 10817233370816701,65434087495967354, 402615569685977397,2518832660928798529, 16016013141937173805] |