n | a(n) |
---|---|
1 | 0 |
2 | 5 |
3 | 4 |
4 | 25 |
5 | 74 |
6 | 278 |
7 | 968 |
8 | 3450 |
9 | 12210 |
10 | 43316 |
11 | 153582 |
12 | 544554 |
13 | 1930920 |
14 | 6846494 |
15 | 24276442 |
16 | 86078740 |
17 | 305217538 |
18 | 1082235538 |
19 | 3837379072 |
20 | 13606528258 |
21 | 48245865110 |
22 | 171069584080 |
23 | 606576433502 |
24 | 2150791206274 |
25 | 7626248942608 |
[0,5,4,25,74,278,968,3450,12210,43316,153582, 544554,1930920,6846494,24276442,86078740, 305217538,1082235538,3837379072,13606528258, 48245865110,171069584080,606576433502, 2150791206274,7626248942608] |