n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 4 |
4 | 19 |
5 | 94 |
6 | 559 |
7 | 3857 |
8 | 30477 |
9 | 271252 |
10 | 2685395 |
11 | 29270806 |
12 | 348322596 |
13 | 4493361500 |
14 | 62457724853 |
15 | 930620100318 |
16 | 14796859595058 |
17 | 250066927156481 |
18 | 4476197996101023 |
19 | 84600142126309335 |
20 | 1683542828313555774 |
[1,0,1,4,19,94,559,3857,30477,271252,2685395, 29270806,348322596,4493361500,62457724853, 930620100318,14796859595058,250066927156481, 4476197996101023,84600142126309335, 1683542828313555774] |