n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 13 |
4 | 40 |
5 | 117 |
6 | 348 |
7 | 1029 |
8 | 3049 |
9 | 9028 |
10 | 26738 |
11 | 79183 |
12 | 234502 |
13 | 694476 |
14 | 2056692 |
15 | 6090891 |
16 | 18038173 |
17 | 53420041 |
18 | 158203433 |
19 | 468519406 |
20 | 1387520047 |
21 | 4109140098 |
22 | 12169216863 |
23 | 36039131181 |
24 | 106729873498 |
25 | 316080480394 |
26 | 936072224321 |
[1,1,5,13,40,117,348,1029,3049,9028,26738,79183, 234502,694476,2056692,6090891,18038173,53420041, 158203433,468519406,1387520047,4109140098, 12169216863,36039131181,106729873498,316080480394, 936072224321] |