n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 6 |
3 | 16 |
4 | 40 |
5 | 105 |
6 | 273 |
7 | 715 |
8 | 1870 |
9 | 4896 |
10 | 12816 |
11 | 33553 |
12 | 87841 |
13 | 229971 |
14 | 602070 |
15 | 1576240 |
16 | 4126648 |
17 | 10803705 |
18 | 28284465 |
19 | 74049691 |
20 | 193864606 |
21 | 507544128 |
22 | 1328767776 |
23 | 3478759201 |
24 | 9107509825 |
25 | 23843770275 |
26 | 62423800998 |
27 | 163427632720 |
[1,3,6,16,40,105,273,715,1870,4896,12816,33553, 87841,229971,602070,1576240,4126648,10803705, 28284465,74049691,193864606,507544128,1328767776, 3478759201,9107509825,23843770275,62423800998, 163427632720] |