n | a(n) |
---|---|
1 | 0 |
2 | 5 |
3 | 15 |
4 | 40 |
5 | 105 |
6 | 275 |
7 | 720 |
8 | 1885 |
9 | 4935 |
10 | 12920 |
11 | 33825 |
12 | 88555 |
13 | 231840 |
14 | 606965 |
15 | 1589055 |
16 | 4160200 |
17 | 10891545 |
18 | 28514435 |
19 | 74651760 |
20 | 195440845 |
21 | 511670775 |
22 | 1339571480 |
23 | 3507043665 |
24 | 9181559515 |
25 | 24037634880 |
26 | 62931345125 |
27 | 164756400495 |
28 | 431337856360 |
29 | 1129257168585 |
[0,5,15,40,105,275,720,1885,4935,12920,33825, 88555,231840,606965,1589055,4160200,10891545, 28514435,74651760,195440845,511670775,1339571480, 3507043665,9181559515,24037634880,62931345125, 164756400495,431337856360,1129257168585] |