n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 5 |
4 | 14 |
5 | 50 |
6 | 194 |
7 | 723 |
8 | 2659 |
9 | 9884 |
10 | 36780 |
11 | 136636 |
12 | 507517 |
13 | 1885793 |
14 | 7006962 |
15 | 26034006 |
16 | 96728470 |
17 | 359395319 |
18 | 1335332919 |
19 | 4961420008 |
20 | 18434129192 |
21 | 68491926888 |
22 | 254481427113 |
23 | 945524491213 |
24 | 3513091674982 |
25 | 13052875206698 |
[0,0,1,5,14,50,194,723,2659,9884,36780,136636, 507517,1885793,7006962,26034006,96728470, 359395319,1335332919,4961420008,18434129192, 68491926888,254481427113,945524491213, 3513091674982,13052875206698] |