n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 10 |
4 | 30 |
5 | 94 |
6 | 309 |
7 | 1068 |
8 | 3798 |
9 | 13854 |
10 | 51834 |
11 | 197150 |
12 | 761151 |
13 | 2984766 |
14 | 11841509 |
15 | 47428821 |
16 | 191899909 |
17 | 783286480 |
18 | 3219622765 |
19 | 13325287138 |
20 | 55516004988 |
21 | 232584392264 |
22 | 979365099918 |
23 | 4144435559953 |
24 | 17617616589605 |
25 | 75193307662253 |
26 | 322164970730139 |
27 | 1385350445979640 |
28 | 5977051004543671 |
[1,2,4,10,30,94,309,1068,3798,13854,51834,197150, 761151,2984766,11841509,47428821,191899909, 783286480,3219622765,13325287138,55516004988, 232584392264,979365099918,4144435559953, 17617616589605,75193307662253,322164970730139, 1385350445979640,5977051004543671] |