n | a(n) |
---|---|
1 | 3 |
2 | 7 |
3 | 14 |
4 | 40 |
5 | 108 |
6 | 362 |
7 | 1182 |
8 | 4150 |
9 | 14602 |
10 | 52588 |
11 | 190746 |
12 | 699600 |
13 | 2581428 |
14 | 9588742 |
15 | 35792568 |
16 | 134223910 |
17 | 505294128 |
18 | 1908896442 |
19 | 7233642930 |
20 | 27487869472 |
21 | 104715443852 |
22 | 399822696082 |
23 | 1529755490574 |
24 | 5864063066500 |
25 | 22517998808028 |
26 | 86607689013412 |
27 | 333599974893066 |
[3,7,14,40,108,362,1182,4150,14602,52588,190746, 699600,2581428,9588742,35792568,134223910, 505294128,1908896442,7233642930,27487869472, 104715443852,399822696082,1529755490574, 5864063066500,22517998808028,86607689013412, 333599974893066] |