n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 15 |
4 | 51 |
5 | 199 |
6 | 755 |
7 | 2821 |
8 | 11457 |
9 | 45421 |
10 | 180609 |
11 | 740097 |
12 | 3026837 |
13 | 12362553 |
14 | 51258493 |
15 | 213094839 |
16 | 885144315 |
17 | 3704575695 |
18 | 15563367115 |
19 | 65372995019 |
20 | 275716820519 |
21 | 1166762781235 |
22 | 4940175457887 |
23 | 20965390531703 |
24 | 89209748891747 |
25 | 379961694898047 |
26 | 1620676281126587 |
27 | 6926567928761055 |
[1,1,5,15,51,199,755,2821,11457,45421,180609, 740097,3026837,12362553,51258493,213094839, 885144315,3704575695,15563367115,65372995019, 275716820519,1166762781235,4940175457887, 20965390531703,89209748891747,379961694898047, 1620676281126587,6926567928761055] |