n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 4 |
5 | 9 |
6 | 22 |
7 | 56 |
8 | 152 |
9 | 428 |
10 | 1257 |
11 | 3827 |
12 | 12023 |
13 | 38975 |
14 | 129801 |
15 | 443833 |
16 | 1554849 |
17 | 5572334 |
18 | 20409121 |
19 | 76283610 |
20 | 290737945 |
21 | 1128730320 |
22 | 4460079331 |
23 | 17924115817 |
24 | 73207479057 |
25 | 303691230784 |
26 | 1278796858227 |
27 | 5462983288161 |
28 | 23664467118878 |
29 | 103895077228910 |
[1,1,1,2,4,9,22,56,152,428,1257,3827,12023,38975, 129801,443833,1554849,5572334,20409121,76283610, 290737945,1128730320,4460079331,17924115817, 73207479057,303691230784,1278796858227, 5462983288161,23664467118878,103895077228910] |