n | a(n) |
---|---|
0 | 1 |
1 | 180 |
2 | 6440 |
3 | 94620 |
4 | 802640 |
5 | 4687108 |
6 | 20924280 |
7 | 76392940 |
8 | 238753440 |
9 | 659632980 |
10 | 1649142216 |
11 | 3796582460 |
12 | 8156356080 |
13 | 16522765220 |
14 | 31822575640 |
15 | 58659933324 |
16 | 104054451520 |
17 | 178420035060 |
18 | 296839277160 |
19 | 480696051420 |
20 | 759737228432 |
21 | 1174643272260 |
22 | 1780196817080 |
[1,180,6440,94620,802640,4687108,20924280, 76392940,238753440,659632980,1649142216, 3796582460,8156356080,16522765220,31822575640, 58659933324,104054451520,178420035060, 296839277160,480696051420,759737228432, 1174643272260,1780196817080] |