n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 6 |
6 | 12 |
7 | 25 |
8 | 54 |
9 | 120 |
10 | 278 |
11 | 666 |
12 | 1671 |
13 | 4355 |
14 | 11804 |
15 | 33019 |
16 | 94960 |
17 | 279219 |
18 | 836907 |
19 | 2550991 |
20 | 7901818 |
21 | 24875931 |
22 | 79667065 |
23 | 259892494 |
24 | 864832484 |
25 | 2938862050 |
26 | 10204420451 |
27 | 36199678110 |
28 | 131086662067 |
29 | 483853193560 |
30 | 1817012289562 |
31 | 6927980565530 |
[1,1,1,2,3,6,12,25,54,120,278,666,1671,4355,11804, 33019,94960,279219,836907,2550991,7901818, 24875931,79667065,259892494,864832484,2938862050, 10204420451,36199678110,131086662067,483853193560, 1817012289562,6927980565530] |