n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 14 |
4 | 64 |
5 | 602 |
6 | 5344 |
7 | 58214 |
8 | 661504 |
9 | 9666482 |
10 | 145897984 |
11 | 2611988414 |
12 | 47548524544 |
13 | 1002692887562 |
14 | 21581168410624 |
15 | 527328466446614 |
16 | 13084553110749184 |
17 | 362312592419199842 |
18 | 10175324275879051264 |
19 | 315223836841156264814 |
20 | 9889646730551557095424 |
21 | 338833067799589889659322 |
[1,2,4,14,64,602,5344,58214,661504,9666482, 145897984,2611988414,47548524544,1002692887562, 21581168410624,527328466446614,13084553110749184, 362312592419199842,10175324275879051264, 315223836841156264814,9889646730551557095424, 338833067799589889659322] |