n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 19 |
3 | 48 |
4 | 645 |
5 | 5346 |
6 | 9989 |
7 | 423680 |
8 | 4936673 |
9 | 22863284 |
10 | 717864203 |
11 | 10398234146 |
12 | 14778845999 |
13 | 2318706892436 |
14 | 41349958502663 |
15 | 67290481692176 |
16 | 1273710986008283 |
17 | 21639017114636720 |
18 | 1870679510063123381 |
[1,4,19,48,645,5346,9989,423680,4936673,22863284, 717864203,10398234146,14778845999,2318706892436, 41349958502663,67290481692176,1273710986008283, 21639017114636720,1870679510063123381] |