n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 31 |
5 | 111 |
6 | 407 |
7 | 1513 |
8 | 5679 |
9 | 21471 |
10 | 81643 |
11 | 311895 |
12 | 1196131 |
13 | 4602235 |
14 | 17757183 |
15 | 68680169 |
16 | 266200111 |
17 | 1033703055 |
18 | 4020716123 |
19 | 15662273839 |
20 | 61092127491 |
21 | 238582873475 |
22 | 932758045123 |
23 | 3650336341239 |
24 | 14298633670931 |
[1,1,3,9,31,111,407,1513,5679,21471,81643,311895, 1196131,4602235,17757183,68680169,266200111, 1033703055,4020716123,15662273839,61092127491, 238582873475,932758045123,3650336341239, 14298633670931] |