n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 61 |
6 | 248 |
7 | 1217 |
8 | 6336 |
9 | 38137 |
10 | 242464 |
11 | 1753245 |
12 | 13219328 |
13 | 112141173 |
14 | 982066816 |
15 | 9583252569 |
16 | 95757641728 |
17 | 1057866255601 |
18 | 11884764271104 |
19 | 146689651631285 |
20 | 1830773338714112 |
21 | 24972471277262509 |
[0,1,2,5,16,61,248,1217,6336,38137,242464,1753245, 13219328,112141173,982066816,9583252569, 95757641728,1057866255601,11884764271104, 146689651631285,1830773338714112, 24972471277262509] |