n | a(n) |
---|---|
1 | 15 |
2 | 42 |
3 | 95 |
4 | 678 |
5 | 3376 |
6 | 16282 |
7 | 80825 |
8 | 377706 |
9 | 1780344 |
10 | 8321484 |
11 | 38431266 |
12 | 177322266 |
13 | 812861536 |
14 | 3712259660 |
15 | 16906747879 |
16 | 76738963064 |
17 | 347459922194 |
18 | 1569637145558 |
19 | 7075367986446 |
20 | 31833804360316 |
21 | 142976818494750 |
22 | 641124031114626 |
[15,42,95,678,3376,16282,80825,377706,1780344, 8321484,38431266,177322266,812861536,3712259660, 16906747879,76738963064,347459922194, 1569637145558,7075367986446,31833804360316, 142976818494750,641124031114626] |