n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 2 |
3 | 26 |
4 | 50 |
5 | 706 |
6 | 1650 |
7 | 24282 |
8 | 62370 |
9 | 940610 |
10 | 2554530 |
11 | 39150810 |
12 | 110311762 |
13 | 1709993346 |
14 | 4945525650 |
15 | 77314273562 |
16 | 228002115650 |
17 | 3587763069826 |
18 | 10741365151810 |
19 | 169903043416730 |
20 | 514833595840370 |
21 | 8177978884039490 |
22 | 25025386537586610 |
[1,2,2,26,50,706,1650,24282,62370,940610,2554530, 39150810,110311762,1709993346,4945525650, 77314273562,228002115650,3587763069826, 10741365151810,169903043416730,514833595840370, 8177978884039490,25025386537586610] |