n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 10 |
5 | 37 |
6 | 154 |
7 | 676 |
8 | 3053 |
9 | 14187 |
10 | 67459 |
11 | 326241 |
12 | 1599480 |
13 | 7933272 |
14 | 39736160 |
15 | 200700204 |
16 | 1021052197 |
17 | 5227501077 |
18 | 26912956631 |
19 | 139244637915 |
20 | 723631840568 |
21 | 3775598797694 |
22 | 19770494002049 |
23 | 103865161431895 |
24 | 547291750362216 |
25 | 2891718659119578 |
26 | 15317429567883000 |
[1,1,3,10,37,154,676,3053,14187,67459,326241, 1599480,7933272,39736160,200700204,1021052197, 5227501077,26912956631,139244637915,723631840568, 3775598797694,19770494002049,103865161431895, 547291750362216,2891718659119578, 15317429567883000] |