n | a(n) |
---|---|
6 | 1 |
7 | 6 |
8 | 27 |
9 | 111 |
10 | 440 |
11 | 1717 |
12 | 6655 |
13 | 25728 |
14 | 99412 |
15 | 384320 |
16 | 1487262 |
17 | 5762643 |
18 | 22357907 |
19 | 86859412 |
20 | 337879565 |
21 | 1315952428 |
22 | 5131231668 |
23 | 20029728894 |
24 | 78265410550 |
25 | 306109412100 |
26 | 1198306570554 |
27 | 4694809541046 |
28 | 18407850118383 |
[1,6,27,111,440,1717,6655,25728,99412,384320, 1487262,5762643,22357907,86859412,337879565, 1315952428,5131231668,20029728894,78265410550, 306109412100,1198306570554,4694809541046, 18407850118383] |