n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 13 |
5 | 36 |
6 | 106 |
7 | 323 |
8 | 981 |
9 | 2992 |
10 | 9196 |
11 | 28392 |
12 | 87946 |
13 | 273287 |
14 | 851579 |
15 | 2659764 |
16 | 8324357 |
17 | 26100560 |
18 | 81969496 |
19 | 257800532 |
20 | 811862268 |
21 | 2559731360 |
22 | 8079294664 |
23 | 25525787344 |
24 | 80719066698 |
25 | 255466082911 |
26 | 809138591431 |
27 | 2564605664428 |
28 | 8134003910311 |
29 | 25813957574292 |
[1,1,1,4,13,36,106,323,981,2992,9196,28392,87946, 273287,851579,2659764,8324357,26100560,81969496, 257800532,811862268,2559731360,8079294664, 25525787344,80719066698,255466082911,809138591431, 2564605664428,8134003910311,25813957574292] |