n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 21 |
4 | 138 |
5 | 1095 |
6 | 10208 |
7 | 109473 |
8 | 1328470 |
9 | 18003675 |
10 | 269580492 |
11 | 4420677525 |
12 | 78801184322 |
13 | 1517300654415 |
14 | 31386251780536 |
15 | 694190761402377 |
16 | 16348768018619694 |
17 | 408472183061464515 |
18 | 10791720442056792740 |
19 | 300605598797790229629 |
20 | 8805117712245004098586 |
21 | 270562051319419652165175 |
22 | 8702576800277309526639504 |
23 | 292425620801795849417200881 |
[0,1,4,21,138,1095,10208,109473,1328470,18003675, 269580492,4420677525,78801184322,1517300654415, 31386251780536,694190761402377,16348768018619694, 408472183061464515,10791720442056792740, 300605598797790229629,8805117712245004098586, 270562051319419652165175, 8702576800277309526639504, 292425620801795849417200881] |