n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 9 |
6 | 25 |
7 | 88 |
8 | 292 |
9 | 1031 |
10 | 3685 |
11 | 13433 |
12 | 49608 |
13 | 185465 |
14 | 699963 |
15 | 2664650 |
16 | 10217130 |
17 | 39428179 |
18 | 153009240 |
19 | 596761737 |
20 | 2337875430 |
21 | 9195732624 |
22 | 36301739221 |
23 | 143780858517 |
24 | 571191310205 |
25 | 2275409450019 |
26 | 9087376470138 |
27 | 36377539265376 |
28 | 145937953205705 |
29 | 586645566919856 |
[1,1,1,3,9,25,88,292,1031,3685,13433,49608,185465, 699963,2664650,10217130,39428179,153009240, 596761737,2337875430,9195732624,36301739221, 143780858517,571191310205,2275409450019, 9087376470138,36377539265376,145937953205705, 586645566919856] |