n | a(n) |
---|---|
1 | 0 |
2 | 3 |
3 | 14 |
4 | 63 |
5 | 324 |
6 | 1955 |
7 | 13698 |
8 | 109599 |
9 | 986408 |
10 | 9864099 |
11 | 108505110 |
12 | 1302061343 |
13 | 16926797484 |
14 | 236975164803 |
15 | 3554627472074 |
16 | 56874039553215 |
17 | 966858672404688 |
18 | 17403456103284419 |
19 | 330665665962403998 |
20 | 6613313319248079999 |
21 | 138879579704209680020 |
22 | 3055350753492612960483 |
[0,3,14,63,324,1955,13698,109599,986408,9864099, 108505110,1302061343,16926797484,236975164803, 3554627472074,56874039553215,966858672404688, 17403456103284419,330665665962403998, 6613313319248079999,138879579704209680020, 3055350753492612960483] |