n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 14 |
4 | 51 |
5 | 201 |
6 | 823 |
7 | 3436 |
8 | 14575 |
9 | 62776 |
10 | 273766 |
11 | 1204282 |
12 | 5337100 |
13 | 23810913 |
14 | 106823537 |
15 | 481534000 |
16 | 2179638646 |
17 | 9902272921 |
18 | 45133705547 |
19 | 206310531515 |
20 | 945515644303 |
21 | 4343445670182 |
22 | 19995082395510 |
23 | 92225885065701 |
24 | 426139227741927 |
25 | 1972226545914777 |
26 | 9141415516033028 |
27 | 42429942858806258 |
[1,1,4,14,51,201,823,3436,14575,62776,273766, 1204282,5337100,23810913,106823537,481534000, 2179638646,9902272921,45133705547,206310531515, 945515644303,4343445670182,19995082395510, 92225885065701,426139227741927,1972226545914777, 9141415516033028,42429942858806258] |