n | a(n) |
---|---|
1 | 0 |
2 | 74 |
3 | 554 |
4 | 3002 |
5 | 15476 |
6 | 78540 |
7 | 388686 |
8 | 1909332 |
9 | 9276316 |
10 | 44749702 |
11 | 214274388 |
12 | 1020029010 |
13 | 4829443432 |
14 | 22761611592 |
15 | 106838241882 |
16 | 499686947334 |
17 | 2329557905400 |
18 | 10829426646892 |
19 | 50212611191750 |
20 | 232275648633150 |
[0,74,554,3002,15476,78540,388686,1909332,9276316, 44749702,214274388,1020029010,4829443432, 22761611592,106838241882,499686947334, 2329557905400,10829426646892,50212611191750, 232275648633150] |