n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 16 |
3 | 46 |
4 | 118 |
5 | 276 |
6 | 712 |
7 | 1805 |
8 | 4895 |
9 | 13280 |
10 | 37993 |
11 | 109386 |
12 | 328219 |
13 | 992413 |
14 | 3101399 |
15 | 9764376 |
16 | 31580645 |
17 | 102797899 |
18 | 342075208 |
19 | 1144125506 |
20 | 3896297053 |
21 | 13319243655 |
22 | 46206520968 |
23 | 160729837020 |
24 | 565901313043 |
25 | 1996113320841 |
26 | 7111795754941 |
27 | 25369213794266 |
[1,4,16,46,118,276,712,1805,4895,13280,37993, 109386,328219,992413,3101399,9764376,31580645, 102797899,342075208,1144125506,3896297053, 13319243655,46206520968,160729837020,565901313043, 1996113320841,7111795754941,25369213794266] |