n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 2 |
7 | 5 |
8 | 14 |
9 | 45 |
10 | 165 |
11 | 667 |
12 | 2944 |
13 | 14076 |
14 | 72492 |
15 | 400021 |
16 | 2354550 |
17 | 14725238 |
18 | 97508022 |
19 | 681552736 |
20 | 5014584788 |
21 | 38740015634 |
22 | 313536416650 |
23 | 2652902840112 |
24 | 23422761943260 |
25 | 215418814359447 |
26 | 2060451979153568 |
27 | 20465943911593384 |
28 | 210812000258805579 |
[1,1,1,1,1,1,2,5,14,45,165,667,2944,14076,72492, 400021,2354550,14725238,97508022,681552736, 5014584788,38740015634,313536416650,2652902840112, 23422761943260,215418814359447,2060451979153568, 20465943911593384,210812000258805579] |