n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 5 |
3 | 19 |
4 | 72 |
5 | 260 |
6 | 923 |
7 | 3243 |
8 | 11313 |
9 | 39275 |
10 | 135938 |
11 | 469544 |
12 | 1619688 |
13 | 5582154 |
14 | 19227215 |
15 | 66200580 |
16 | 227874107 |
17 | 784248508 |
18 | 2698752555 |
19 | 9286235592 |
20 | 31951747845 |
21 | 109934789410 |
22 | 378238848290 |
23 | 1301340023409 |
24 | 4477248965334 |
25 | 15403837196135 |
26 | 52996202385909 |
[0,1,5,19,72,260,923,3243,11313,39275,135938, 469544,1619688,5582154,19227215,66200580, 227874107,784248508,2698752555,9286235592, 31951747845,109934789410,378238848290, 1301340023409,4477248965334,15403837196135, 52996202385909] |