n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 25 |
6 | 70 |
7 | 199 |
8 | 588 |
9 | 1784 |
10 | 5544 |
11 | 17569 |
12 | 56628 |
13 | 185202 |
14 | 613470 |
15 | 2054998 |
16 | 6952660 |
17 | 23732911 |
18 | 81662152 |
19 | 283026021 |
20 | 987369656 |
21 | 3465222945 |
22 | 12228193432 |
23 | 43369190282 |
24 | 154532114800 |
25 | 552998717472 |
26 | 1986841476000 |
27 | 7164993393905 |
28 | 25928281261800 |
29 | 94132464529902 |
[1,1,2,4,10,25,70,199,588,1784,5544,17569,56628, 185202,613470,2054998,6952660,23732911,81662152, 283026021,987369656,3465222945,12228193432, 43369190282,154532114800,552998717472, 1986841476000,7164993393905,25928281261800, 94132464529902] |