n | a(n) |
---|---|
2 | 20 |
3 | 651 |
4 | 8344 |
5 | 64667 |
6 | 361884 |
7 | 1607125 |
8 | 5997992 |
9 | 19535997 |
10 | 57014776 |
11 | 151986562 |
12 | 375470160 |
13 | 869285378 |
14 | 1902886024 |
15 | 3966657702 |
16 | 7920130544 |
17 | 15220758070 |
18 | 28268206764 |
19 | 50910912965 |
20 | 89176474920 |
21 | 152305796565 |
22 | 254193384900 |
23 | 415363487955 |
24 | 665644575960 |
25 | 1047743815755 |
[20,651,8344,64667,361884,1607125,5997992, 19535997,57014776,151986562,375470160,869285378, 1902886024,3966657702,7920130544,15220758070, 28268206764,50910912965,89176474920,152305796565, 254193384900,415363487955,665644575960, 1047743815755] |