n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 23 |
3 | 103 |
4 | 457 |
5 | 2021 |
6 | 8927 |
7 | 39415 |
8 | 174001 |
9 | 768101 |
10 | 3390599 |
11 | 14966887 |
12 | 66067129 |
13 | 291634565 |
14 | 1287337487 |
15 | 5682582967 |
16 | 25084135393 |
17 | 110726731589 |
18 | 488771441783 |
19 | 2157541529575 |
20 | 9523849084969 |
21 | 42040303802789 |
[1,5,23,103,457,2021,8927,39415,174001,768101, 3390599,14966887,66067129,291634565,1287337487, 5682582967,25084135393,110726731589,488771441783, 2157541529575,9523849084969,42040303802789] |