n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 15 |
3 | 110 |
4 | 605 |
5 | 3100 |
6 | 15595 |
7 | 78090 |
8 | 390585 |
9 | 1953080 |
10 | 9765575 |
11 | 48828070 |
12 | 244140565 |
13 | 1220703060 |
14 | 6103515555 |
15 | 30517578050 |
16 | 152587890545 |
17 | 762939453040 |
18 | 3814697265535 |
19 | 19073486328030 |
20 | 95367431640525 |
21 | 476837158203020 |
22 | 2384185791015515 |
23 | 11920928955078010 |
24 | 59604644775390505 |
25 | 298023223876953000 |
[1,0,15,110,605,3100,15595,78090,390585,1953080, 9765575,48828070,244140565,1220703060,6103515555, 30517578050,152587890545,762939453040, 3814697265535,19073486328030,95367431640525, 476837158203020,2384185791015515, 11920928955078010,59604644775390505, 298023223876953000] |