n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 5 |
3 | 26 |
4 | 141 |
5 | 798 |
6 | 4706 |
7 | 28820 |
8 | 182461 |
9 | 1188406 |
10 | 7926102 |
11 | 53910828 |
12 | 372671250 |
13 | 2610977388 |
14 | 18498911268 |
15 | 132310178472 |
16 | 953981219997 |
17 | 6926326243110 |
18 | 50593306470542 |
19 | 371528742549692 |
20 | 2741187564459910 |
21 | 20310150708154564 |
[0,1,5,26,141,798,4706,28820,182461,1188406, 7926102,53910828,372671250,2610977388,18498911268, 132310178472,953981219997,6926326243110, 50593306470542,371528742549692,2741187564459910, 20310150708154564] |