n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 13 |
5 | 61 |
6 | 346 |
7 | 2326 |
8 | 17973 |
9 | 156849 |
10 | 1525708 |
11 | 16366685 |
12 | 191936577 |
13 | 2442829157 |
14 | 33533382056 |
15 | 493855262997 |
16 | 7766996408942 |
17 | 129920667204110 |
18 | 2303139100436493 |
19 | 43131514062719763 |
20 | 850867141055471684 |
[1,1,2,4,13,61,346,2326,17973,156849,1525708, 16366685,191936577,2442829157,33533382056, 493855262997,7766996408942,129920667204110, 2303139100436493,43131514062719763, 850867141055471684] |