n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 51 |
4 | 216 |
5 | 1095 |
6 | 6588 |
7 | 46137 |
8 | 369120 |
9 | 3322107 |
10 | 33221100 |
11 | 365432133 |
12 | 4385185632 |
13 | 57007413255 |
14 | 798103785612 |
15 | 11971556784225 |
16 | 191544908547648 |
17 | 3256263445310067 |
18 | 58612742015581260 |
19 | 1113642098296043997 |
[1,4,14,51,216,1095,6588,46137,369120,3322107, 33221100,365432133,4385185632,57007413255, 798103785612,11971556784225,191544908547648, 3256263445310067,58612742015581260, 1113642098296043997] |