n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 1 |
3 | 7 |
4 | 9 |
5 | 21 |
6 | 148 |
7 | 281 |
8 | 997 |
9 | 3037 |
10 | 83436 |
11 | 187155 |
12 | 906986 |
13 | 4040713 |
14 | 19429075 |
15 | 967161214 |
16 | 2687357885 |
17 | 15062567325 |
18 | 76117375036 |
19 | 495916450391 |
20 | 2830109972230 |
21 | 258366446110567 |
22 | 832033559653913 |
23 | 5503200805013334 |
[1,2,1,7,9,21,148,281,997,3037,83436,187155, 906986,4040713,19429075,967161214,2687357885, 15062567325,76117375036,495916450391, 2830109972230,258366446110567,832033559653913, 5503200805013334] |