n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 15 |
3 | 73 |
4 | 432 |
5 | 2466 |
6 | 12690 |
7 | 67628 |
8 | 395896 |
9 | 2378907 |
10 | 14778790 |
11 | 93389066 |
12 | 562139796 |
13 | 3163874871 |
14 | 17458695226 |
15 | 100299771120 |
16 | 608013094016 |
17 | 3788103579016 |
18 | 23633567094114 |
19 | 145391247840963 |
20 | 873481016484060 |
21 | 5103300936908811 |
22 | 29074526437910272 |
23 | 163299878621689106 |
[0,3,15,73,432,2466,12690,67628,395896,2378907, 14778790,93389066,562139796,3163874871, 17458695226,100299771120,608013094016, 3788103579016,23633567094114,145391247840963, 873481016484060,5103300936908811, 29074526437910272,163299878621689106] |